With season 8 on the horizon, I thought I'd share my own personal rankings of each season, from my favorite to least favorite. I wasn't sure where to include the My Little Pony Movie, so I included it with season 7. 

Season 1

1. The Best Night Ever
2. The Cutie Mark Chronicles
3. Sonic Rainboom
4. Party of One
5. Swarm of The Century
6. Feeling Pinkie Keen
7. Suited For Success
8. Winter Wrap Up
9. Green Isn't Your Color
10. Dragonshy
11. Over a Barrel
12. Friendship Is Magic
13. Stare Master
14. Call Of The Cutie
15. A Dog and Pony Show
16. Fall Weather Friends
17. Apple Buck Season
18. A Bird In The Hoof
19. The Show Stoppers
20. Boast Busters
21. Griffon The Brush Off
22. Bridle Gossip
23. Look Before You Sleep
24. Owl's Well That Ends Well
25. The Ticket Master

Season 2

1. A Canterlot Wedding 
2. Lesson Zero
3. Read It And Weep
4. The Return Of Harmony
5. The Last Roundup
6. It's About Time
7. Luna Eclipsed
8. Hurricane Fluttershy
9. Sweet and Elite
10. Sisterhooves Social
11. Hearts and Hooves Day
12. A Friend In Deed
13. Ponyville Confidential
14. May The Best Pet Win!
15. Family Appreciation Day
16. The Super Speedy Cider Squeezy 6000
17. Putting Your Hoof Down
18. Hearth's Warming Eve
19. Baby Cakes
20. MMMystery on the Friendship Express
21. Secret of My Excess
22. The Cutie Pox
23. The Mysterious Mare Do Well
24. Dragon Quest

Season 3

1. Magical Mystery Cure
2. The Crystal Empire
3. Sleepless In Ponville
4. Too Many Pinkie Pies
5. Magic Duel
6. Keep Calm and Flutter On
7. Wonderbolts Academy
8. Apple Family Reunion
9. Games Ponies Play
10. Just for Sidekicks
11. One Bad Apple
12. Spike at Your Service

Season 4

1. Twilight's Kingdom
2. Pinke Pride
3. Filli Vanilli
4. Rarity Takes Manehatten
5. Flight To The Finish
6. Equestria Games
7. Daring Don't
8. Princess Twilight Sparkle
9. Maud Pie
10. Castle Mane-ia
11. For Whom The Sweetie Belle Toils
12. Bats!
13. Twilight Time
14. Three's A Crowd
15. Simple Ways
16. PInkie Apple Pie
17. Trade Ya
18. Power Ponies
19. Testing, Testing, 1, 2, 3
20. Inspiration Manifestation
21. It Ain't Easy Being Breezies
22. Somepony to Watch Over Me
23. Leap Of Faith
24. Rainbow Falls

Season 5

1. Crusaders Of The Lost Mark
2. Amending Fences
3. Slice Of Life
4. The Mane Attraction
5. Do Princesses Dream of Magic Sheep?
6. Rarity Investigates!
7. Tanks For The Memories
8. Make New Friends But Keep Discord
9. The Cutie Re-Mark
10. The Cutie Map
11. Castle Sweet Castle
12. Scare Master
13. Party Pooped
14. The One Where Pinkie Pie Knows
15. The Lost Treasure Of Griffonstone
16. Brotherhooves Social
17. Canterlot Boutique
18. Hearthbreakers
19. Appleloosa's Most Wanted
20. Made in Manehattan
21. The Hoofields and McColts
22. Bloom & Gloom
23. Princess Spike
24. What About Discord

Season 6

1. A Hearth's Warming Tail
2. The Saddle Row Review
3. The Fault In Our Cutie Marks
4. Gauntlet of Fire
5. To Where and Back Again
6. The Times They Are a Changling
7. Top Bolt
8. The Gift of the Maud Pie
9. No Second Prances
10. Stranger Than Fan Fiction
11. On Your Marks
12. Every Little Thing She Does
13. The Crystalling
14. Spice Up Your Life
15. 28 Pranks Later
16. Viva Las Pegasus
17. Buckball Season
18. Flutter Brutter
19. Where the Apple Lies
20. P.P.O.V (Pony Point of View)
21. Newbie Dash
22. Dungeons & Discords
23. The Cart Before the Ponies
24. Applejack's "Day" Off

Season 7

1. The Perfect Pear
2. Shadow Play
3. It Isn't the Mane Thing About You
4. A Royal Problem
5. Forever Filly
6. Secrets and Pies (One of the funniest episodes)
7. Fame and Misfortune
8. All Bottled Up
9. Celestial Advice
10. Parental Glideance
11. Rock Solid Friendship
12. Once Upon a Zeppelin
13. My Little Pony the Movie
14. Fluttershy Leans In
15. Hard to Say Anything
16. To Change a Changeling
17. Discordant Harmony
18. Campfire Tales
19. Daring Done?
20. Triple Threat
21. Uncommon Bond
22. A Health Of Information
23. Marks and Recreation
24. A Flurry of Emotions
25. Not Asking For Trouble
26. Honest Apple

Equestria Girls

1. Rainbow Rocks
2. Forgotten Friendship
3. Friendship Games
4. Legend Of Everfree
5. Dance Magic
6. Mirror Magic
7. Movie Magic
8. Better Together Shorts
9. Summertime Shorts
10. Choose Your Own Ending Shorts
11. Equestria Girls (2013)