I just got a Nook, and am in the middle of a crazy book-downloading spree. But I need ideas. Recommend good books to me, especially science fiction or fantasy. For reference, some of the books in those genres I have already read and loved:

Douglas Adams
Neal Stephenson's Anathem
Everything good by Weis/Hickman (DragonLance, Death Gate Cycle)
Joe Abercrombie's First Law trilogy


Some other stuff I've already read at least some of (so you don't need to recommend them):

George R. R. Martin
Robert Jordan's Wheel of Time
David Eddings
Terry Goodkind's Sword of Truth
Stephen King
Piers Anthony
Orson Scott Card
Terry Pratchett's Discworld
Stephen R. Donaldson's Thomas Covenant

I haven't even read a book on my Nook yet, and I already love it.