I forget some of the names of the characters. Its been awhile since I've played some of the games.
FF1 - I didn't like that the dragons has such a pathetic role. Okay you get an almost insignificant upgrade from them but they has no purpose.
FF2 - I cant remember enough to comment.
FF3 - I haven't gotten around to playing the DS game yet. Nes version was too long ago to comment.
FF4 - I didn't like the Tolls. Tellah annoyed me a little bit.
FF5 - I didn't like the old guy with amnesia.
FF6 - I liked the main characters, except Gau. Also I didn't like the Jellyfish Squid thing or the ghosts on the ghost train.
FF7 - I liked Yuffie. Just needed to say that

I personally didn't like Cid all that much...
FF8 - Fuck off (Say that like Yahtzee said it for Bowling in the Wii resort review).
FF9 - Quina. I mean why? Blue Mage can be done so well but nooooo, we have to have a doll/tonberry clone.
FF10 - Kimari annoyed me only because he wasnt given a proper purpose. I cant say I really liked Donna so much.She was rude for not proper reason.
FF10-2 - See FF8
FF11 - I didn't like the Mitra who starts the Aht Urgan missions... The more she says, the more I dislike her. Any NPC Taru annoyed me because the speak like "We Really-Weally need to startaru talking aboutaru the mission-wission."
FF12 - The main characters didn't annoy me. However, I didn't like the guest characters. Mostly because they don't level.
I might mention the characters from the spin off games later.