I'm always really really surprised by how many on here are into fantasy/sci fi books - I had no idea they were so popular and don't know many IRL who read them.
I read all genres, but mostly all classics or modern books with really high reviews. I'm kind of a book snob, if I consider it "fluffy" I feel like it's a waste of time and I'd rather watch a movie. The lightest reading I've ever done is Jodie Picoult, and I wouldn't read anything by her by choice anymore.
I read a lot of plays, Shakespeare, Sartre, Albee, lots of post-modern (Pynchon, Vonnegut, Nabakov), A TON of Russian stuff (Dostoevsky, Tolstoy) - that's my favorite genre. Then other stuff like Love In The Time of Cholera, Moby Dick, Ragtime, The Poisonwood Bible, 10,000 Leagues Under The Sea, Candide, etc.
ETA: dystopian or fantasy/sci-fi has to be like Orwell or Bradbury or something. I also read a ton of children's novels, Bridge To Terabithia, Alice In Wonderland, Pinocchio, The Giver, etc.