I like science fiction... currently my favorite author is Robert J. Sawyer. Hard sci-fi with interesting characters and social themes.

I highly recommend Rollback featuring a romance of an elderly couple.

His WWW Trilogy (www:Wake, www:Watch, and www:Wonder)is maybe my favorite book series ever (toppling Issac Asimov's Foundation), about the internet becoming sentient and learning morality from a teenage blind girl. Sounds silly but truly brilliant ideas and some exciting themes.

I'm currently reading his new novel... Just released a week or so ago, Quantum Night about the nature of psychopathy and consciousness. He has several novels considering the nature of consciousness.