Overall, I'm more of an RPG man, myself, as those types of games give me the most freedom (i.e; character customization, romance options, etc...)
Goldeneye back on the N64 was the only FPS I enjoyed for a while, until Halo. Now I'm an avid first person and third person shooter fan.
I recentley bought Empire at War, and this is starting a tentative like of RTS's, which I usually find boring.
Other then those, I play other genres quite regularly.