Warhammer 40K (I play Tyranids(still new to the game)) and/or D&D. I have the core books and complete warrior for 3.5.
Played 3.5 and 4.0 though I only have books for 3.5. Been a while since I played because I can't travel far and it's so hard to find a close group. Hypothetically I'm available any time since I don't work but it's probably better if it's only once a week.