I've always liked Cranky the most, but they don't quite feel the same to me anymore... I'd probably go for Snooty because my favorite villager (Ankha) resides in that group.
Wow, didn't expect uchi's to be getting so much love, I'm sure I've seen them bashed in other similar threads. They're definitely my favourite female personality right now, all the others seem a little...insipid, in this game.