Oddball and the Cops
Shows where law enforcement teams up with someone unusual or quirky.
Left Us Hanging
Shows that ended in a profoundly unresolved manner.
A Crush Led Me Here
Shows I like primarily because of (or entirely because of) a crush on one of the actresses/characters.
I don't get it, but I do.
Murderers/Assassins as protagonists
Shows with duplicates of people or where characters have multiple personalities.