RPGs Make Me Smile (no, Not Rocket Propelled Grenades, Silly!)
I'll start out by saying that I've played WoW for a while now, and while that isn't really so much of an RPG it's an MMORPG, and I just love that mouthful.
I have also played the Star Wars RPG on many different occasions. It was my first introduction to an RPGs and I just love it. I've always been a huge fan of the Star Wars universe (not so much the movies, even the classic ones, but they're necessary and still awesome, so it's all good). I've been reading the Star Wars books since probably fourth grade or so and I just love the idea of a completely new galaxy and universe that I can go out and do anything that I want in.
I love being able to live without restrictions (but when you have a good enough GM, you still have to be careful and not go to crazy), but it's so much easier to take a chance and get over your fears in that imaginary world, because that's something I have a huge problem doing in real life.