While I love all the characters on My Little Pony: Friendship is Magic, my absolute favorite is Rarity. I find her to be the most believable and dynamic of the cast, and have really enjoyed watching her character develop over the course of the series. Rarity's a great character, and perfectly embodies her element: Generosity.

However, a small but vocal minority of fans insist that Rarity doesn't live up to her element, and for them I've made this list. Let's begin, shall we?

Friendship is Magic, Part 1

Rarity gives Twilight Sparkle, a complete stranger at the time, a free hair treatment after seeing her disheveled mane. This sets the tone for Rarity's generous nature; When Rarity sees someone in need, she steps up and offers them assistance.

Friendship is Magic, Part 2

After hearing Steven Magnet's lament over his lost mustache, Rarity consoles the sorrowful serpent by slicing off her own tail and affixing it to his face. What I really love about this scene is that you can just tell that this was a big sacrifice on Rarity's part. Even though she plays it off by saying "short tails are in" and "it'll grow back," she gives herself away by how relieved and happy she is to have her tail restored by the Elements of Harmony later on. Rarity compromised her own appearance - something she takes enormous pride in - to help the sea serpent with his appearance.

Look Before You Sleep

After a tree crashes through Twilight's bedroom window, Applejack informs Rarity that she needs her help to clear it out, and that she can't do it without her. Rarity overcomes her fear of mud and dirt, plunging headfirst into the foliage, getting uncomfortably dirty in the process. As much as it repulses her, she does it to help her friend and to do the right thing.

Swarm of the Century

Rarity makes Rainbow Dash a fancy outfit for Princess Celestia's arrival. Even though Rainbow Dash hates standing still in order to be fit for the dress, she has no problem with the dress itself, and this seems to be a genuine favor on Rarity's part.

Winter Wrap-Up

Rarity is so focused on helping Twilight repair her nest that she spends the entire episode working on it. While this wastes a lot of time, her heart was in the right place.

Suited For Success

Here, Rarity makes dresses for all of her friends, twice (three times in Fluttershy's case), then put her entire career at risk by letting them wear the redesigned dresses at her fashion show.

Sonic Rainboom

Remember, it was Rarity who convinced everyone to go to Cloudsdale to support Rainbow Dash in the competition, as she was the only one who recognized Dash's stagefright. She also willingly volunteers to be the test subject for Twilight's wing spell. True, she lets the wings go to her head, but she does demonstrate incredible empathy for Dash before becoming enamored with her wings.

A Dog and Pony Show

Rarity shows appreciation for Spike's help by giving him a large gem.

Additionally, after being kidnapped, Rarity actually shows some initial generosity to her captors. Once she learns that they want gems, she actually shows them where they can be dug up. It's only after they try to force her to stay and work for them that she unleashes her full force on them and orchestrates her brilliant escape (taking the gems with her).

Green Isn't Your Color

Despite her envy of Fluttershy, Rarity stands up and applauds for her friend the moment the crowd turns against her. Rarity risks her own reputation to save her friend's, no matter how she feels.

Owl's Well That Ends Well

Rarity makes Spike a snazzy gem-encrusted bowtie (and later makes another one for Owlowicious). Considering how much Spike likes gems, this is a thoughtful gift in particular.

Party of One

Rarity willingly sticks her head into a garbage can to keep Pinkie Pie's birthday party a surprise, showing tremendous dedication to making one of her friends happy. Remember, Rarity hates dirtiness, so this is a clear breach of personal comfort on her part.

Return of Harmony, Part 1

Despite having already stated how uncomfortable she is at getting out in the rain, she still gives her umbrella to Twilight to shield her from Discord's chocolate milk rain near the beginning of the episode.

Sisterhooves Social

Rarity participates in an outdoor sporting competition and gets completely covered in mud just to make amends with her sister. Once again, Rarity forgoes her own comfort for someone else, and does it again by playing in the rain with Sweetie Belle during the episode's conclusion.

The Cutie Pox

Upon seeing Apple Bloom is depressed, Rarity offers her a new hat to cheer her up. I find this impressive because Rarity really doesn't know Apple Bloom that well. But since she's her sister's friend, Rarity is invested enough in her well-being to freely give her something to make her happy. It doesn't work, but again, the thought's what counts.

The Mysterious Mare Do Well

Rarity and her friends show Rainbow Dash a bit of tough love by using a superhero persona to knock her out-of-control ego down a peg. Rarity contributes to this by stitching together four identical superhero costumes for her friends to wear, which is no small task.

Sweet and Elite

No matter how much Rarity wants to fit in with the Canterlot elite, she stands by her friends in the end, proudly letting everyone know how important they are to her. As much as she wants to be part of high society, she puts all of that at risk without a second thought for her friends.

Secret of My Excess

Inspired by Spike's generosity, Rarity makes capes for each of her friends, free of charge.

A Friend In Deed

Rarity doesn't even appear on screen in this episode, but her generosity can be felt. Pinkie has Rarity make a new toupee for Cranky Doodle Donkey. Since Pinkie asked for the favor, she most likely provided the hairpiece free of charge.

Putting Your Hoof Down

Rarity and Pinkie Pie both are extremely understanding of Fluttershy, despite how unkindly she treats them after Iron Will's dubious assertiveness lessons. They even confront Iron Will and attempt to protect Fluttershy from his debt-collecting, all despite their treatment earlier, because that's what good friends do.

Dragon Quest

Rarity is concerned for Spike's safety for the whole episode, and constructs a dragon disguise for her, Rainbow Dash, and Twilight to wear so that they can keep an eye on him. She's even willing to fight deadly, fire-breathing dragons to protect Spike in the end.

Ponyville Confidential

Interestingly, Rarity is the most understanding and willing to talk of all the people hurt by the Gabby Gums column. You can't really blame the other ponies for refusing to talk to or see the Crusaders, of course, but Rarity takes the higher road and directly speaks to Sweetie Belle, letting her know in the clearest possible terms that humiliating others and making them feel horrible is not her little sister's destiny. I think this is significant, because Applejack, Rainbow Dash, Fluttershy, and even Twilight (understandably) refuse contact with these kids, while Rarity - concerned with her sister's life choices - gives her a very heartfelt lesson.

Sleepless in Ponyville

She goes camping. True, she brings an unnecessarily huge load of luggage and saddles Sweetie Belle with carrying it, but to go at all despite how uncomfortable it makes her is a great example of Rarity learning from Sisterhooves Social. She wants to spend time with her sister, even if it's not an activity she enjoys doing.

Spike at Your Service

Willingly eats Spike's horribly burned pie just to make him feel good. Rarity truly values Spike's feelings, and knows he'd be crushed if she rejected the pie he made for her. No matter how awful it is, Rarity eats a little bit of it for Spike's sake.

Just for Sidekicks

You thought that small gem Rarity gave Spike was her being cheap? Wrong. That tiny gem bought an expensive, industrial-strength hair dryer. The size of a gemstone is not always proportional to its value. Rarity's gem may have been the most expensive one of the whole lot, above and beyond the expected payment for his pet-sitting.

Games Ponies Play

In the absence of Cadence's hairdresser, Rarity willingly steps up to the challenge of arranging the princess's hair herself.

Equestria Girls

Dubious example, since Rarity's human counterpart is technically a separate character with her own history and personality, however close it may be to pony Rarity's. Nevertheless, this version of Rarity mirrors her pony counterpart's generosity, offering Twilight - a complete stranger - a free disguise to hide from the teasing of the other Canterlot High students after Snips and Snails upload an embarrassing video of her.

Castle Mania

A bit of an abstract example, as the generosity isn't to any particular character, but to art itself. Rarity goes out of her way to restore ancient art that once belonged to the royal pony sisters. She's not keeping it for herself or treasure-hunting here; She's restoring it for its own sake, a selfless act.

Bats!

Despite her discomfort with the vampire fruit bats, Rarity does her part to help Applejack reign them in (though she dons a protective biohazard suit to do so). Rarity's gotten a lot better at overcoming personal discomfort to help others.

Rarity Takes Manehattan

What doesn't Rarity do here? Let's just make a quick list of her generosity in this episode:

• Gets her friends tickets to Hinny of the Hills
  
• Buys Spike a carrot-dog
  
• Gives multiple generous tips to the bellhop
  
• Gives a complete stranger her scarf
  
• Buys a grumpy stranger a flower to cheer him up
  
• Fixes a cabbie's broken wheel
  
• Lends Suri Polomare her one-of-a-kind fabric
  
• After her moment of weakness and mistreatment of her friends, Rarity profoundly regrets her actions and is willing to give up the entire competition to make amends with them, not even caring that she apparently lost the contest.
  
• Arranges a private showing of Hinny of the Hills, at the price of remaining in Manehattan and designing costumes for her playwright friend.
  
• Hooks Coco up with a new job once she learns that she quit.
  

Really, this episode alone is a perfect example of Rarity's generosity.

Rainbow Falls

Rarity makes the uniforms for the Ponyville team. She also volunteers to paint the team's horseshoes, and offers Rainbow Dash a silk bandage in the hospital.

Three's A Crowd

Along with Applejack, Rarity is more than willing to take care of Discord so that Twilight Sparkle and Cadence can have a day to themselves. While she and Applejack catch the blue flu and are unable to help, it's the thought that counts!

That's it so far! This master list will be updated as the series progresses.