2. Nineteen Eighty-Four -- George Orwell
3. Brave New World -- Aldous Huxley
1984 entered my elite "bounce" category immediately upon completion. HHGTTG was... okay, sorta, but it beat the one joke into the ground far too long. BNW was ... interesting.
4. Do Androids Dream of Electric Sheep? -- Philip K. Dick
5. Neuromancer -- William Gibson
6. Dune -- Frank Herbert
7. I, Robot -- Isaac Asimov
8. Foundation -- Isaac Asimov
9. The Colour of Magic -- Terry Pratchett
I've read several Pratchetts. They just don't work at all for me. Sorry, Pterry, I wish they did, because everything I've seen about you seems to indicate you're a cool guy.
10. Microserfs -- Douglas Coupland
The only one on the list I've never heard of.
11. Snow Crash -- Neal Stephenson
12. Watchmen -- Alan Moore & Dave Gibbons
Both bloody masterpieces. Though Ozymandias isn't nearly as smart as he thinks he is.
13. Cryptonomicon -- Neal Stephenson
14. Consider Phlebas -- Iain M Banks
15. Stranger in a Strange Land -- Robert Heinlein
16. The Man in the High Castle -- Philip K Dick
17. American Gods -- Neil Gaiman
18. The Diamond Age -- Neal Stephenson
19. The Illuminatus! Trilogy -- Robert Shea & Robert Anton Wilson
20. Trouble with Lichen - John Wyndham