Star Wars novels, anything by Heinlein, Asimov, and H.G. Wells, the Hitchhikers books, the first two Red Dwarf novels. I read some of the Target Doctor Who novels in the 90s (I'm buggered if I can remember which ones I read), and liked them. I have one or two by Robert Jordan that I've still not read, but he's highly recommended to me by several friends.