Name pretty much any decent sized fandom, and I've probably dabbled, so feel free to go crazy.
Also, anybody got ideas for a good serial killer that my classmates probably won't choose for their papers? I'm thinking I'll go non-American for this (and obviously not Jack the Ripper either, come on), but that's mostly because the non-Americans are the ones who get the really good body counts. America may have more serial killers, but 90% of them have less than five victims. Laaaaame.