Cheers is one of my favorite shows. I am currently starting a DVD collection of Cheers. The Diane/Sam relationship is a great piece of storytelling through humor and comeuppance. When she left and Rebecca replaced her, it wasn't the same, and the quality dipped a little, but it's a great show nonetheless. My favorite episode would have to be the pilot, "Give Me A Ring Sometimes" and the finale, because it seems like it all comes full circle.