Sitcom spin-offs are so common we often don't realize that some of most beloved sitcoms are spin-offs. The Simpsons is a spin-off of The Tracy Ullman Show. Of course not all spin-offs enjoy the same kind of success, like the Friends spin-off Joey, or M*A*S*H spinoff AfterMASH. There have been many over the years. But one show that never got a spin off that many of us with had, was Seinfeld. It's hard to believe that Seinfeld, now a staple of comedy syndication, is still earning Jerry Seinfeld loads of money. His show about nothing went off the air 15 years agofeel old?and is still funnier than most of what passes for comedy these days. The lack of a spin-off sitcom is largely due to Jerry Seinfeld himself opposing the idea. It's a shame, really. There was so much potential for a number of successful spin-offs (and in a way Curb Your Enthusiasm works as a somewhat spin-off... but not really) Here are five that I think could have worked.