The HST book was the fear and loathing one.
Obviously a sitcom being funny is important, but degree of what I consider good acting weighs heavily for me.
In Beaver, I so loved the "Eddie Haskell" character.
But Dick Van Dyke was absolutely spellbinding/mesmerizing to me as a kid. I can start laughing just looking at him in that show.
Liked Mary and Mel (Richard Deacon, who also had a recurring role in Beaver) a lot too.
While I'm spilling about past shows, I should also mention a great love for "The Wild, Wild West", especially the Artemus Gordon character.