I would consider myself a lifetime hardcore gamer, because I've literally played games since I was so young, that I can not even comprehend a time that I wasn't a gamer.
My whole life has been set up around video games in that respect. (not to be confused with obsession, because it's on a completely different level).
honestly, I'll play any game, any system any time, for as long as is possible. Genres that interest me the most though are puzzle and RPGs, platformers, and action/adventure, but like I said, I'm fine with any genre really.