I think I like:
Main Six: FlutterShy/AppleJack (can't choose between them), RainbowDash, Pinkie/Twilight/Rarity
CMC: AppleBloom, SweetieBelle/Scotaloo
Royals: Luna, Celestia, Cadence (Cadence also annoys me alittle I really don't know why)
Music: DJ Pon3
Boys: Spike, Dr. Hooves, Big Macintosh