Classics like Vonnegut's Slaughterhouse 5 and Breakfast of Champions too.
I rather liked Vonnegut too. But my favorite science fiction author is Kilgore Trout. His ideas are put out there but don't get beaten to death like a lot of pulp sci-fi.
"Come all of you cowboys and don't ever run As long as there's bullets in both of your guns" -- Woody Guthrie