I can't believe no one has mentioned MASH or Cheers, two of my all time favorites. Also, The Bob Newhart Show, The Carol Burnett Show, and Spenser for Hire, starring the late Robert Urich. Spenser for Hire never quite caught on, I think due to it being moved to at least 3 different nights of the week. A very cool sly guy, Avery Brooks, was on that show too.