My primary system is 3.0 D&D, which I run campaigns for and look for games to join in. But I'm also currently substitute-DMing a 3.5 game while the main DM, Emiricol, is busy taking care of his newborn. After the current little plot arc, I'll be passing the sub-DM role to Memnus. I'm none too fond of 3.5's mostly-needless-and-stupid changes, after I had just gotten used to 3.0 and confident in my rules knowledge. Very little of 3.5 in my opinion is actual fixes. I've been trying to get into games of Shadowrun, D20 Modern, or Everquest D20, but with no real success so far. Played AD&D 2E for around five years or so before 3E came out, and still wouldn't mind joining or DMing a 2E game someday if one of my groups wanted it.