[Anonyman!]

Ok, I mean genre-wise, but with wiggle-room. Don't say "action" or "strategy".
And you'll probably provide more than one genre unless your a fanatic douche nozzle. Anyway, I would appreciate if you then gave an example and say why you like that game or what not. I'll start.

I love system shock. (Think Bioshock with more RPG and less mind raping philosophy speak. (which I enjoyed)) System Shock was both a great RPG, and a great FPS. This combination was a true beauty.