Sports games. Any. And I'm not a huge fan of racing games, unless they have a well implemented gimmick so that its not JUST driving around in a convoluted "circle" as fast as you can. I don't go out of my way to play Burnout or Flatout. But I have really enjoyed them from time to time. But they're about the only racing games of that nature

Also seriously open-world sand-box games like GTA. I'm with everyone else on that. I really never found out what the appeal was. The story wasn't very driven or gripping. So the real point of the game for most people is to just run around and cause havoc which gets old really quick. Conversely, interestingly enough, I thoroughly enjoyed both Saints Row games. Because they actually do drive the story and make the plot feel important. And you can go around and rain hell. But they managed to make it so its just as fun to play the actual game. Hard to place my finger on the exact difference. But -usually- Saints Row > GTA

Mario/Zelda/Metroid to a much less degree. Played them all before. Pretty much the same for any Nintendo franchise though. I tried Twilight Princess recently, and just couldn't get into it. Never got into Wind Waker either. The quirky silence. The slow running from here to there. The pattern's all the same. The play-style is all the same. Which is great when you like that kinda thing. I loved New Super Mario Bros. And then I tried it for Wii. Pretty good. Same old same old, really. And it got old really quickly. I'd say its because I have nobody to play with, but that's not the point with Metroid and Zelda. And I've only ever tried Metroid games. I own Metroid Prime. I've played the old school ones on emulators. I never beat a single one. Again, too much lather rinse repeat

I will say MOST FPS games turn me off for the same reason. I never beat Halo 2. And even trying Halo 3 was a chore. Halo ODST was different, but still just not my thing. I can't imagine how people play Modern Warfare, Halo 3, or Gears for hours and hours on end. Though there have been a few sparse sprinklings of fun and enjoyable FPS games. I really did like the first Gears game and would probably like the others. But they're short, brutal, and intense. A quick fun ride. Not something I'd clock in 200 hours in multi-player with though, but at least I enjoyed the single-player campaign

Which is another thing. I loathe games that have a single player campaign as an afterthought. Which is pretty much all FPS games at this point. That's the main reason I can't get into Halo 3 or Modern Warfare. The campaigns were just barely there. Short, not very intense, just there to fill out the game. Which now that I think about it is kinda a problem with a lot of simulation games. Racing games are very much just drive around in a circle. How is that supposed to be fun? I remember SEGA used to have some racing game with some anime story going on in between racing with rivalries and stuff. And I think you had to do more than just race. So that was an interesting idea. I'm guessing the "airplane" games suffer from the same problem

Also, I'm rambling. So I'm gonna stop now. Break's almost over at work