Seasons:

1. Season 5
2. Season 4
3. Season 2
4. Season 9
5. Season 1
6. Season 6
7. Season 3
8. Season 8
9. Season 7

Seasons 8 and 7 are the closest I come to disliking, Seasons 3 and 6 still have some really good episodes. Season 1 is this high for some classic and cute moments that are now nostalgic. (13 years...)

Two-parters and film: (I'm not including Equestria Girls but you can if you like)

1. The Beginning of the End
2. The Ending of the End
3. The Movie
4. The Cutie Remark
5. To Where and Back Again
6. Twilight's Kingdom
7. The Crystal Empire
8. The Return of Harmony
9. A Canterlot Wedding
10. Friendship is Magic
11. School Raze
12. Shadow Play
13. Princess Twilight Sparkle
14. School Daze
15. The Cutie Map
16. The Crystalling