Buffy the Vampire Slayer (and 1990s)
Felicity (2 seasons in the 1990s)
Once and Again
Pit Bulls and Parolees
Real Housewives of NYC/OC/BH (don't judge!)
Honorable mention to the one season show, Pasadena. It aired just after 9/11, so that may have been one of the reasons it didn't find an audience.