Science Fiction, or Speculative Fiction if you prefer. Fantasy too. Asimov, Bradbury, Clarke, Dick, Heinlein and other SF books. SF movies and TV shows. Fantasy stuff like Tolkien and Game of Thrones. Laser guns, space ships, and time travel. etc. Star Trek, Battlestar, Star Wars, etc.
Simpsons TV Show. The /r/TheSimpsons subreddit is fan base of redditors who love The Simpsons. The Simpsons is an American animated sitcom created by Matt Groening for the Fox Broadcasting Company. The show is set in the fictional town of Springfield and parodies American culture, society and television.
A community of [Community](http://en.wikipedia.org/wiki/Community_(TV_series\)) fans, and the subreddit that's streets ahead! Voted [5th best new Reddit community of 2010](/r/community/comments/f4ln0/congrats_rcommunity_were_the_5th_best_reddit/) and [2nd best little Reddit community of 2011](/r/community/comments/qocuk/not_sure_if_anyone_else_noticed_this_but_we_came/)!