I think they're all great for the casual game player, but if you like to analyze things like a lot of us here do, then they probably all suck.
Personally, I love to play TPiR but detest PYL, and I think the 1st edition Karn's Family Feud was alright.
Every game I own has been played in a group, and the response is always very good despite multiple differences in game play, the game vs. the actual show.