Because you like Garth Algar in Wayne's World
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.
Samantha Jones is a try-sexual who'll try anything once. See them in Sex and the City.
Jack's big imagination is never limited by his incredibly cramped surroundings. See them in Room.
As a doctor-in-training, John Dorian should have his head in the game. But most of the time, it's in the clouds. See them in Scrubs.
Chuckie Finster is a baby afraid of everything from clowns to closets, unless his best friend's by his side. See them in Rugrats.
Darcy Lewis is a razor-sharp scientist studying things that science can't explain. See them in Thor.
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 Kelso gets by on his good looks and his openhearted nature. See them in That '70s Show.
Blunt but anxious, Gretchen Ross bonds most easily with those who have lived tough lives like she has. See them in Donnie Darko.