Only D&D right now, as since I've moved, no one else plays other RPGs really (or I just haven't found a group)
When I lived In Ottawa ('93-'99), I played Vampire: The Masquerade and Shadowrun more often than D&D, and I ran a game system called NIght Life... still go that book around here somewhere.
Before that, in college, was heavy into Rifts and Battletech
Of the ones I don't play anymore, only miss Vampire...