Well, as we are living in a time where Science Fiction has become Science Fact, I have been finding returning to science fiction a good relief from all the bad news of Oil Depletion, Global Warming, and Empire Destruction.
Dune is very good. I am watching it on VHS and waiting for the DVD version to arrive. The Spice and The Oil seem very analogous.
Star Trek was always my favorite. Alas, it will NEVER happen. So, now, I have been leaning towards the Dystopian Science Fiction genre.