Anything. I'll happily play in any setting, and with any system. I have experience with Pathfinder, (Old) World of Darkness, Eclipse Phase, D&D 2/3.5/4, and a few others I can't pick off of the top of my head right now.
If you're looking for a good, well rounded player that won't bring anything ridiculous to the table, send me a message or inquire in the discussion! I'm normally free to play on Saturdays (US Central time here), and other various days throughout the week that fluctuate based on my work. (I'll provide my schedule on a week-by-week basis so we can work out more days to play.)