FF: Aeris. A LOT. I won't go into a whole thing about exactly why, but I just do.
Cait Sith as well. Completely useless in my opinion.
Rosa. Uck.
Yuna, although not as much as everyone else on the list. It's her voice, and sometimes the way she acts.
Freya bugs.
Other: The faerie from Drakengard, Leonard's pact-beast. As soon as I it started talking I wanted to strangle it.
Hrm...Laura from Silent Hill2.
I thought I did, but I guess I actually dont dislike a lot of video game characters. But the ones i hate, I usually hate with a passion.
:D