Mane 6- fave to least fave (But I love all of them)
Pinkie Pie, Rainbow Dash, Twilight,Fluttershy, Apple Jack,Rarity
Princesses- fave to least fave (again,I love them all)
Luna,Cadence, Celestia .( I'm not counting Twilight for various reasons.)
Cmc- (I think you get the idea now)
Sweetie Belle, Scootaloo. Apple Bloom
Bg characters- My faves ( I can't include all of them,not in any order)
Derpy, Vinyl, Bonbon,Lyra, Colgate/Minuette, Octavia.

*These are all just my opinions*