What game have you played the most this gen, and what game coming out do you think you will play the most, and will that game overtake the playtime from the current game? lol, I was just thinking about this, because Diablo III and Battlefield 3 are coming :P.
Currently (and still playing):
Bad Company 2
Diablo III (I am sure this will win, as they come out much less often and its freakin Diablo!)