I was big into D&D back in the day (Basic/Expert, AD&D up through 2nd edition, maybe 2.5). I was the DM most of the time. I also played some other games like Gamma World, 007, some Mayfair games, etc.
I moved on into Champions (a Hero system superhero RPG) and then on into pure Hero system, running fantasy, ninja, sci-fi, street-level supers, spies, all kinds of games using the Hero system.
I also played Magic: The Gathering for a while and was a bit too good and spent a bit too much money at the time. I sold all my cards when I decided to stop bleeding money.
I don't play any RPGs anymore, though. But I have loads of stories and memories from them.