I find it's just that with PC gaming, I find myself taking it a little more seriously (on reflection that sounds incredibly sad) than console gaming, but with console gaming I can just sit in a comfy chair or something, controller in hand and just play.
I like quite a lot of genres of games, though, including but not limited to in kind of a rough order of 'like': platformers, FPS, 2D fighters (such as Guilty Gear, brilliant series), rpg, puzzle games, and arcade-a-like games such as burnout.
Then again I kind of grew up on platformers and fighting games but only more recently have I been getting into FPS and RPG games.