I'm currently reading William Gibson's Sprawl Trilogy. Just finished Neuromancer and am about to begin reading Count Zero. It's a toss up between Robert Heinlein's Stranger In A Strange Land and Frank Herbert's Dune as my most favorite Sci Fi novels of all time. But Asimov's Foundation series and Robot series hold a special place in my heart. Arthur C. Clarke is just astounding. It's as if modern technologists read his novels and go to work. He's just a GIANT in every sense of the word. Also deserving special mention is David Brin's Uplift Trilogy. Specifically, Brightness Reef. That novel is amazing -- just amazing. I mean I was with those dolphins and whales deep in the oceans. What a great novel that one is. And my final two favorite authors are Philip K. Dick and Octavia E. Butler. Philip K. Dick we know all about. Octavia E. Butler's Xenogenesis series blew my mind! Just unbelievable storytelling. Check that out if you haven't.