Because you like Brian Griffin in Family Guy
Kenny McCormick is a boy of few words who likes nudie mags, NASCAR, monster trucks, origami, and Peruvian pan flute bands. See them in South Park.
Leonard Hofstadter is the normal one among his scientist friends, though in fairness that's a low bar. See them in The Big Bang Theory.
Chuckie Finster is a baby afraid of everything from clowns to closets, unless his best friend's by his side. See them in Rugrats.
Call her. Beep her. If anyone's in trouble, Kim Possible is there. See them in Kim Possible.
The Ice King is lonely and looking for a princess to sweep him off his feet. See them in Adventure Time.
Vincent Vega likes a good steak, a cheap milkshake, and killing a target without anything going wrong. See them in Pulp Fiction.
Javert is an inspector with a single-minded focus: to bring criminals to justice. See them in Les Miserables.
Moe Szyslak is the crabby owner of the grimiest bar in Springfield. See them in The Simpsons.
A short-tempered guy, Bowser is determined to wreak havoc on the Mushroom Kingdom. See them in Super Mario Bros..
A stylish agent, Agent J would rather improvise than play by the rules. See them in Men in Black.
Scooby-Doo always keeps his priorities in order: eat snacks first, solve mysteries later. See them in Scooby-Doo.