I've seen a lot of people on Tumblr and stuff wanting Katt. She seems pretty popular because her design is different. Personally, I don't really like her but then again, Moe creeps me out and he's quite well liked, too.
Also, the wolves can't really have "bad" personalities. Just personalities you don't agree with. I don't like the snooty and uchi personalities(which, yes, a lot of the wolves have) but the cranky personality is one of my favourites. They always seem to be kind of a fatherly figure on the town. There are people out there who consider the peppy personality or the jock personality "bad" for probably similar reasons you dislike snooties and crankies.
Also, the wolves can't really have "bad" personalities. Just personalities you don't agree with. I don't like the snooty and uchi personalities(which, yes, a lot of the wolves have) but the cranky personality is one of my favourites. They always seem to be kind of a fatherly figure on the town. There are people out there who consider the peppy personality or the jock personality "bad" for probably similar reasons you dislike snooties and crankies.