Dancing, Fitness and all that: I don't like dancing, and I don't have weight problems, so no, thanks.
Puzzles: Entertaining at first, but get boring fast.
Life Sims: Cleaning the backyard is boring, why I'm doing it again in a game?
MMO's: Spent hundreds of hours on those before they had graphics, and I'm not going to do it again.
FPS, TPS: Tried them and never enjoyed them. Shooting isn't my favourite way to deal with enemies.
RTS: I actually do like those, but playing them makes me feel sick since I got RTSphobia in 1997 summer. Two months without friends and internet, crap on TV, and the only games I had were Warcraft II, Panzer Dragoon and Sega Rally, all of them beated. So the only thing I could do in those two months was to play those crazy extra stages of Warcraft II like alamo. It sounds like a joke, but it isn't.