1. Semyor Guado, he was simply irritating and keep coming back no matter how many times i killed him, seriously he beat the sheer often cringing idiotic ability of Tidus to ruin the immersion.
2. Sheva's AI on Insane diffuculty, I could put up with her otherwise but f*ck sake don't walk at Wesker you dumbass. he will hit you and cant get over there to save you in the under 1 seconds insane gives you to help someone, oh yea and that was irritating to.
3. the writing in Alpha Protocol, I could forgive the blandness of Thornton, if he didn't sound like and ass-hole 9/10, seriously if I pick suave I want something Bond the OTT sexual innuendo master might say not "hey you look good when I can barely see you", and dam is that guy bland, he's like the colour beige.
4. Not a person but the odd way the characters in ANY FF game are put together, there's allways a emo-teen (Tidus, Hope ect) and very very very excitable often irritating one (Vannile, Yuffie, Rikku) the often cool Badass (Auron, Pain (Pain was only in FFX-2 and for that fact only she is the most hated creating in the history of JRPG's) i could go on but I wont.
5 again not really a person per-say but "Greifers", these are a unique group in MMORPG's who pray on noobs, who while irritating can be excused for it, come on be nice to the noobs they have to learn, "baiting", "flipping" (id add wow tricks but I dont play it) ect are there tricks of the trade, and these can sometime ruin an experience for noobs, guys wait, let them learn then kill them when they go where there not safe PVP aera's, low-sec what ever. note i don't hate scammers in games (eve-online is a good example) the scams are so easy to spot if you fall for it you bloody deserve it idiot.
ill stop here and apologise now for the length, grammer and spelling