Spinoff Doctors

With news of a Grey's Anatomy spinoff starring Kate (Dr. Addison Montgomery) Walsh, we're obligated to march out the best and worst of the second-generation series genre
"¢ Everybody knows Cheers begat Frasier. Did you know Cheers also begat The Tortellis, a Dan Hedaya vehicle that co-starred Casey Kasem's wife? It ran for four months in 1987.
"¢ Certain shows had a knack for producing memorable offspring. Happy Days gave birth to Laverne & Shirley, Mork & Mindy and "“ less memorably "“ Joanie Loves Chachi. All in the Family gave us The Jeffersons and Maude "“ which itself gave us Good Times.
"¢ Three's Company, on the other hand, was less successful. The Ropers and Three's a Crowd were not good.
"¢ Matlock begat Jake and the Fatman begat Diagnosis: Murder.
"¢ The Golden Girls led to Empty Nest, which led to Nurses. The Golden Girls also led to The Golden Palace, a spin-off involving Blanche, Rose, Sophia, Don Cheadle and Cheech Marin. I swear I'm not making this up.
There are plenty more examples.
But rather than going on and on about Daria and Family Double Dare, let me pose a question. Are there any characters you wish had been spun off into their own series? Niles Crane? President Santos? Robin Colcord? D.J. Conner? Andy Keaton?