I personally didn't like all of the FF XII cast. They all look... well... kind of same. Plus, their storylines and dialogues are blank, empty.
And I also don't like Hope and Vanille from FF XIII. Vanille is simply dull, and Hope has not very good weapon aesthetically wise, his character is bad (another litlle bitchy kid) and his looks are to darn feminine.
And about Rikku & Tidus from FFX, since they are getting a great ammount of dislike here:
I don't know how they made it, but Rikku is the only litlle-cheerfull-blondie girl in gaming industry, that not only I did not dislike, but even had a bit of liking towards.
And Tidus...Okay, can't say anything about his looks, he really does look kind of crappy, but about his character: he is not a douchebag, he is just too darn proud of himself in the beginning, he changes later. Plus his overdrives are mighty fine.
Oh,yeah, laugh... Well, it was supposed to be stupid, because it's a fake laugh.