Because you like Alex P. Keaton in Family Ties
Shawn Hunter may be a bit of a rebellious bad boy, but he has a heart that's pure gold. See them in Boy Meets World.
Driven by obsession and anxiety, Monk bravely overcomes, or at least battles, his fears to help the world. See them in Monk.
Ted Logan wants to party on, but if doesn't get an A+ on his history presentation, he'll flunk out and be sent to a military school in Alaska. See them in Bill & Ted's Excellent Adventure.
Olive Hoover is an irrepressible child beauty queen (or would-be queen) who doesn't play by your rules. See them in Little Miss Sunshine.
Michael Bluth is the only sane person in a family of eccentrics. At least, that's how he thinks of himself. See them in Arrested Development.
Chuck Bartowski is a sweet, laid-back electronics store/top secret government employee. See them in Chuck.
The seasoned detectives in River Heights have got nothing on amateur sleuth Nancy Drew. See them in Nancy Drew.
A working class janitor with a world-class mind, Will Hunting is cocky, brash, and combative about his future. See them in Good Will Hunting.
A sarcastic and nosy tomboy, Stephanie Tanner is understandably not crazy about being the middle child. See them in Full House.
Don't tell anyone Kate Austen was under arrest when the plane crashed. See them in Lost.
Izzie Stevens is a model-turned-med student who can do it all, even if people underestimate her. See them in Grey's Anatomy.