I pretty much exclusively read technical books. Most recently, Hacking Vim and Programming Collective Intelligence. I own all the classic tomes; GoF, Refactoring, Code Complete and so on which I re-read occasionally. I haven't read a piece of fiction in quite a while.

Although, when I did read fiction, I enjoyed Chuck Palahniuk, Orson Scott Card and for pure entertainment, Clive Cussler.