I try to play 3 - 4 times a week, usually at night with sessions lasting 2 - 4 hours. I haven't played as much as I would like to this summer trying to enjoy the nice weather with in my free time but a winter wonderland is the perfect excuse to put some more playtime in.

Whenever I feel like it but I reserve evenings for a little AC multi-player action.

Me? 3-7 hours per day. Usually start on 9 PM until dawn.