Coming to America was probably my favorite. I'll admit that Harlem Night's is a guilty pleasure of mine though. As bad as it is in parts, there's little nuances and one-liners that just kill me. As a teen it was probably Cop I, but as I've gotten older, Coming to America's characters just crack me up.
All that being said, I'm kinda looking forward to him going back on stage... as long as he isn't going to try to revive his singing career.