I've recently gotten into the various retro-clones, including Swords & Wizardry, Basic Fantasy, Labyrinth Lord, etc. I had burned out completely on DnD 3e, and I don't personally care for 4e. I've been following a number of blogs, and finally decided to add my two bits to the discussion.
I used to be a very vanilla DnD player, and was not comfortable straying far outside of that. Planescape helped expand my horizons a bit. Then the Necromancer Wilderlands stuff added in a few laser pistols and similar stuff, though it was really rare. Then I picked up Carcosa and started reading Planet Algol. Both of these are pretty fantastic sources of gaming. And they are not shy about adding in robots or Cthulhu monsters. I really enjoy this, and it actually makes the game feel more fun.
I'm also working on my own rpg, which is kind of a mix of OD&D and Traveller. It can be found at: http://home.comcast.net/~danbuter/SwordBoard.pdf if you are interested.