Tropers / The Fuzzinator
I'm probably too old to be as big a closet nerd as I am, but by now I doubt I'll ever outgrow it. I'm a huge fan of Tolkien, Lois Bujold, Jim Butcher, Stephen King, Doctor Who, and the X-Files, and spend more time than I should on TV Tropes. It hasn't ruined my life, but it's definitely played merry hell with my vocabulary. Not that that's a bad thing.