Well, he was really old and had a good life. The sad ones are guys like Bill Hicks, Carl Sagen, etc.
PF was in at least 4 of my all time favorite movies (Wings of Desire, Far Away So Close!, The Princess Bride, and It's a Mad Mad Mad Mad World) and I loved Collumbo. He left the word a better place than it was when he got here, and that's what a human is supposed to do, in whatever way they can.