X, then..... I don't know. I like certain char's from each game. I don't think a cast was necessarily horrible, except X.

Tidus- whiney little bish
Yuna- clone of Aeris and Rinoa conglomerated
Wakka- fights with a ball?! Seriously? Wtf.
Lulu- .... enough said
Auron- Decent
Rikku - Yuffie and Selphie clone gone skanky
Kimouri- Lame