Because you like Benjamin Braddock in The Graduate
Linda Belcher doesn't prescribe to what society deems as "normal." She narrates her life through song, much to the alarm of everyone nearby. See them in Bob's Burgers.
Moe Szyslak is the crabby owner of the grimiest bar in Springfield. See them in The Simpsons.
Marge Simpson is a mostly happy housewife and subscriber to Sponge and Vacuum Magazine. See them in The Simpsons.
Shana is a red-haired warrior with a black-and-white worldview. See them in Shakugan no Shana.
A karate master/rocket scientist/squirrel, Sandy Cheeks is the only one who can clean up the other resident's messes in Bikini Bottom. See them in SpongeBob SquarePants.
Mike Hannigan is a lawyer-turned-pianist who loves to tap into his kooky side. See them in Friends.
Veronica Mars is a sarcastic private eye whose biggest mission is surviving high school. See them in Veronica Mars.
A consummate schemer with a knack for solving mysteries, Shawn Spencer has trouble taking anything seriously. See them in Psych.
Driven by obsession and anxiety, Monk bravely overcomes, or at least battles, his fears to help the world. See them in Monk.
With most of the people that Sango loved now gone, the only thing she wants is to kill the demon who destroyed her village. See them in Inuyasha.
Sometimes being a supportive girlfriend like Ophelia doesn't work out too well. See them in Hamlet.