19. What I Like About You (The WB, 2002-2006)
Starred: Amanda Bynes, Jennie Garth, Wesley Jonathan, Leslie Grossman, Allison Munn, Nick Zano
Not even the combined hotness of Amanda Bynes and Jennie Garth could make this show likable, because as Manhattanite sisters Holly and Val, they play two of the most insufferably self-possessed women in sitcom history. Which would be fine, if the series knew and owned that. Instead every episode revolves around some contrived romantic hijinks or triangle that features both of them over-acting and over-reacting, even though hundreds of sitcoms before have informed every step of their well-worn melodrama. How this lasted for damn near 100 episodes we'll never know.