I enjoyed Hocus Pocus, but then I've not read any Vonnegut I didn't like.
The Rachel Papers isn't bad - a lot lighter than his later stuff. I think Amis hit his peak with Money and London Fields. His later stuff is very so so.
I really enjoyed 'The Windup Girl' - I've got one his other books on the unread pile, must give it a go soon.
Hitchhiker's Guide to the Galaxy is great fun, although the sequels do become increasingly patchy. The original radio series is still the benchmark though
Just read 'Manhattan in Reverse' by Peter F Hamilton - like most short story collections it's a little patchy, but a decent read.
Currently finishing off 'Live By Night' by Dennis Lehane. I'm not a big fan of American crime novels, but Lehane is an exception. The central idea of a gangster who is basically a good man shouldn't work, but somehow he pulls it off.