To me, Sports Night is one of the most overrated cult favourites. It’s just people talking fast and repeating themselves. If they spoke the same dialogue at a normal pace, little of it would have been funny.
While I agree with most of the choices on here, I’ll pick one off the board and say Grounded for Life was an outstanding series that got canned off of one network, moved to UPN losing a couple of key supporting actors, and still managed to hang on, though not as brightly as its first seasons.
Greg. The. Bunny.
The reason they’re delaying new Scrubs is that Zach Braff is doing two movies.
The Larry Sanders Show, followed closely by The Slap Maxwell Story.
I remember it. It was great. It was my first thought when I saw this thread title. Happy to see that I wasn’t the first to mention it. It was one of those slightly quirky, out-of-the-ordinary, not your run-of-the-mill shows that needed time to build an audience, but the network didn’t give it that time. A shame.
I really like it too, but it wasn’t really a sitcom. It was an hour-long “dramedy”. Still, another great show killed before its time.
Hey, 87 and still no mention of ER. No, not the George Clooney drama, but a little-known sitcom from the early eighties starring Elliott Gould. Funny as all hell.
Roadfood writes:
> . . . a little-known sitcom from the early eighties starring Elliott Gould . . .
And also featured George Clooney (although not as the star).
ER, underrated? Isn’t a key characteristic of an underrated program that it doesn’t get the popularity it deserves?
D’oh! Never mind.
House Calls with Capt. “Trapper” John and Lynn Redgrave.
Grandpa Goes to Washington with Jack Albertson and Maj. Frank Burns.
Quark with Richard Benjamin.
And they added a laugh track when it got moved – a terrible decision. That’s a TOTALLY underrated sitcom. One of the few where the kids were actually a little funny. Also check out the movie “The Tao of Steve” if you haven’t, stars Donal Logue .
I second, or third, Married With Children. This show is top 5 for some of the sharpest writing and well defined characters in a TV sitcom. It gets written off because a good part of the jokes are juvenile (though well-written juvenile). It’s also underrated for what it did for the FOX network. Yes, The Simpson’s really sprang the network, but MWC laid the foundation. It’s the first show that got people talking about the “Fourth Network”.
Dweebs (well, I liked it, anyway…) 
Anything But Love with Richard Lewis.