I started playing D&D in 1982, when I was in 6th grade. I played with a GREAT group all through high school and early college… D&D, Champions, Vampire, Robotech, Star Wars, Traveller, and maybe others which aren’t coming to mind at the moment—in about that order of frequency. I still play with those guys when we can get together… about once per year. And when we meet, we play a homebrewed D&D First Edition.
I volunteered for Chaosium for a summer and got paid in books, so my shelves are heavy with Call of Cthulhu, which I have run. I have also run D&D (3.5)… Pathfinder adventures, as well as my own world.