Well, I game a lot. :)
I've been playing D&D since probably 1999-2000 or so. Started with 2nd edition, switched to 3.0 when it was released, switched to 3.5 when it was released, and I have played 4e as well. Currently, I am playing and running Pathfinder pretty much exclusively. I have also played quite a few other systems, ranging from D20-based to nothing like D20: White Wolf's VTM and Exalted; BESM; BESM D20; Blue Rose; Iron Heroes; Arcana Evolved; The Amber RPG; Spirit of the Century; and various others.