Dick Cavett used to write on the Tonight Show, both for Jack Paar and Johnny Carson. He heard two people debating which was better. Pro-Paar said, "Carson's a drag. In all his career he'll never shed a single tear." Pro-Carson said, "For which I will be profoundly grateful to him."
Paar was a mercurial raconteur, known for wearing his emotions on his sleeve, which made for some fascinating television. He could also cut to the quick when moved to. Once he was interviewing a fat comic, Jack Leonard, who said, "You know, my wife is an acrobat." Paar replied, "She'd have to be."
This clip captures a lot of that - he's describing working with Jonathan Winters (who's sidesplitting in this), telling a great self-deprecating story, and almost breaking down at the end.