City of Heroes, Maple Story, Angels Online. We don't have any from any sort of sim game or any old-school games. I'm certain sombebody would pick one that looks like Pac Man eating your DNA scores.
I'd also like to see some generic sigs and some broader-genre ones. For example, one that's just space, or a general Star Wars one. Maybe one that's just a generic sword, but otherwise similar to the generic gun for the FPS quiz. Some game companies would also let you make a sig out of their company logos.