I'm an avid roleplayer. If I had to classify myself, I'd say I'm primarily narrativist, secondarily gamist. I don't have much stomach for simulation.
I run a lot of homebrew rules-light rpgs.
Of the commercial systems, I enjoy Savage Worlds, Fudge, Risus, The Shadow of Yesterday, Dogs in the Vineyard, Perfect, Dread, Above the Earth.
Here's 13 Virtues, the 1-page roleplaying game.
For folding instructions, see http://www.pocketmod.com
There are some great sites for Roleplaying games and theory.