I've participated in these before but I'll bite again. My favorite authors are Gene Wolfe and
William Gibson. I'm a fan of Wolfe's
Book of the New Sun series (4 books, condensed into 2 in the past decade or so). I have not read the Long Sun books and I really should. I like Gibson's "Bridge Trilogy" (Virtual Light/Idoru/All Tomorrow's Parties). He started going in a different direction with Pattern Recognition and the more recent Spook Country which I haven't finished (I just noticed he has another book from this year I don't have yet).
I don't read (fiction) a lot either. I think it depends on what my lifestyle is like at the time. Recently I've read a lot of technical books on Drupal/PHP/jQuery and various other programming related. I also read a book on WWII recently called Rise & Fall of the Nazis. I've enjoyed reading Joseph Citro's books on paranormal in VT/New England.
In the past I've enjoyed:
Piers Anthony (Xanth series, Incarnations of Immortality, etc.)
Margaret Weis and Tracy Hickman (Dragonlance series, etc.)
Douglas Adams (Hitchhikers series)
(as a young reader) William Sleator
of course the Harry Potter books (not as a young reader since I was not young at the time)
the Resident Evil series by Stephani Perry (I'm a big fan of RE, otherwise these were pretty throw away)
the Robotech novels (these were surprisingly cool after the first one)
some H.P Lovecraft
some books on prehistory and evolution (the time before history, the ancestor's tale)
Georges Bataille's Story of the Eye was always sort of powerful in it's crazy sexuality (along these lines I have some Marquis de Sade which I still have yet to read)
and speaking of things I haven't read:
I have a really cool unabridged English translation of the Journey West which I still haven't read, and also an unabridged English version of 1000 and 1 Nights (1000 Nights and 1 Night) (Ok, I read a little of both but have been meaning to read more).