Now that I think of it... quite a few.
I have disliked any first person shooter since Call of Duty 2. Shooters in my opinion have not evolved since then besides graphical performance.
I very much dislike Japanese anime styled games [and other media, for that matter] in art style, and avoid games with this as a whole.
I truly cannot stand any title that includes Mario in it's title since Mario World. Yes, this includes Kart. I had Wacky Wheels at that point anyway.
I dislike Racing games where they add realistic cars, but make sure you can't total it. So I tried GTA4, which I hoped was just that. It wasn't, and instead was about taking criminals bowling, and ignoring your phone. I hated that within the hour.
I dislike any non-platformer game, that inludes platforming in a certain level, or worse, two. Well, just those levels, but I can end up disliking the game for it.