I'm a refugee from the demise of the great UK Roleplayers forum - I've got to get my RPG forum fix somewhere, and you lot seem a bit more adult than GitP.
I'm a GM since the 80s, now running Pathfinder, used to BECMI D&D, 3.x D&D. Strangely, I've never warmed to 4th and 5th Ed, but I don't hate them.
As far as homebrewing goes, I'm mainly long-term pondering my ongoing project of a d20-ish, E6-ish, middle-ages-ish, superhero-ish game.