Twilight Sparkle: She's the leader of the group, because of her smarts and reliability She's responsible enough to take care of herself and take care of others without too many problems. Magic is her element, and you can definitely tell why she is.
Applejack: If Twilight were away for some reason and there was no one to be the leader of something, then Applejack would be the next in charge. She's very reliable and helps her friends when they need help. Honesty is one of her highlights as she never tells a lie that would hurt anyone.
Rainbow Dash (best pony) The athletic, competitive, sportsmanship type of pony! She's the type who doesn't show fear to the enemy and stand up for her friends when needed. If you need anyone to be by your side, knowing that you won't be left behind then Rainbow Dash is the perfect pony to call as her element is Loyalty!
Rarity She's very focused into being clean and tidy, she absolutely hates dirt and anything that's messy. But she cares about family and that's something you can really appreciate of her. She can sometimes be greedy in some ways, but all-in-all she's the element of Generosity and she can be generous at times.
Fluttershy Very shy to everyone new she meets, although when it comes to animals and responsibility, she's very skilled in taking care of her animal friends and helping out with their problems. Even though she's shy and timid most of the time, she can really stand her ground when her friends are in serious trouble. Her 'stare' is the last thing you'd want her to do to you, unless you're Discord of course
Pinkie Pie She's a huge party animal and bounces up and down all the time 24/7! But making her friends smile and laugh is one of her best specialties. She never ceases to amaze me with her crazy, random, silly moments she always has and is easy to see why a lot of people love her so much.
Spike Spike is more than 'just a pet' because he's not a pet at all. He's Twilight's #1 assitant and is one of the most reliable dragons ever! He may be just a baby dragon, but just for his age and size he's capable of doing awesome things. Season 3 is where Spike really had his shining moments, saving the Crystal Kingdom and all, that's a pretty huge deal and a spectacular way to start of a brand new season!
CMC Applebloom, Sweetie Belle and Scootaloo! These three are an amazing group, not to mention Babs Seed but we'll just leave her out for this ;P Even though it's clear to see what their 'true' talents are, it's still pretty funny and awesome to see them try totally different and new ways for finding a cutie mark.
Princess Celestia Goddess of the Sun can't be an easy job, especially when you banished someone close to your and had to work double shifts for the past 1000 years! Although you'd expect someone whose been in royalty for hundreds for years to be snobby and prissy, Princess Celestia is actually quite fun-loving and kind. Her 'trolling' side is what really surprised me in a funny way, I bet the Cake family never expect to be trolled by a Goddess xD
Princess Luna Probably the fandom's most favorite Princess, her evil/corrupted side was a pretty interesting character. Princess Luna (or Woona) being the Guardian of the Night is such an awesome title, you can't disagree. Her special abilities that make her go in your dreams to help you is something Princess Celestia can't do and that's saying something!