I'm a huge science fiction nerd, from Arthur C. Clark to Dan Simmons.
Below are my favorite books (not necessarily in order), send me your thoughts.

So far:

  1. Andromeda Strain by Michael Crichton
  2. Dune by Frank Herbert
  3. Rama Series by Arthur C. Clarke
  4. Hyperion Cantos by Dan Simmons
  5. Do Androids Dream of Electric Sheep by Philip K. Dick
  6. The Martian Chronicles by Ray Bradbury
  7. I, Robot by Isaac Asimov
  8. Foundation Series by Isaac Asimov
  9. The Fountain Head by Ayn Rand

On my list: 

  1. Stranger in a Strange Land by Isaac Asimov
  2. Homo Deus