Seems to be the same thing everyone says on this thread, "when his show was funny." It's a shame. When Letterman became obsessed with mean-spirited hard-left politics, he ceased to be funny. He should've retired several years ago. I stopped watching him regularly in the late '90s.
Yep, Letterman WAS funny. I remember his daytime show in 1980. (I used to schedule my college classes around it.)
Thoroughly enjoyed his show through the 80's when Chris Elliott was the head writer, for the most part. Show tailed off in the 90's and was pretty much dead when it went to CBS. (Couric should've paid attention.)
RIP Calvert DeForest.