I played D&D alot in high school, but we never did the live action stuff. These days i just play the video games. I am still quite addicted to the forgotten realms/dragonlance and other tsr novel series. last I remember there was a d30 and a d100, which were both pretty useless since the same rolls could be done with d10's. It was more like the geek sportscar, just for show
speaking of the starnge ones, I used to have a friend that was really hard to watch action movies with, because everytime something exciting happend he would start talking about what level the guy must be, how high his rolls were, what skills or class he was using, ect... it was pretty irritating to be at the climax of the movie and have him shouting DOUBLE D!