Oh man...it depends on the day. I don't remember how many times I've read the Foundation Trilogy (which is *way* more than 3 books). Other re-read favorites are The Physician (Noah Gordon), Pillars of the Earth (Ken Follett), Larry McMurtry's Lonesome Dove series and Ayn Rand's The Fountainhead and Atlas Shrugged. I recently read Orson Scott Card's Ender series - the first book rocked but the rest peetered out. And of course the whole line of Ludlum's and Clancy's work. Not to mention some of Steven King's work, favorites being The Stand, The Talisman, and The Dark Tower series - hey isn't the new one out...?
Eek, I completely forgot books from Michael Crichton. All the books are at least 97% better than each of the movies. I do wish I had read the books before seeing the movies, as the imagery in my head would have been a lot better than "Hollywood Magic."