Because you like The Man with No Name in The Good, the Bad and the Ugly
In constant agony, Ava Starr will do anything to give up the superpowers that are slowly killing her. See them in Marvel Cinematic Universe.
Aslan represents everything good and just, he's just not super reliable. See them in The Chronicles of Narnia.
Polite and clever, Annie James is not afraid to stir up a little mischief. See them in The Parent Trap.
Whether it's a fire or a pit of lions, there's almost no predicament that Violet Baudelaire can't get her and her siblings out of. See them in Lemony Snicket's A Series of Unfortunate Events.
Gomez Addams fills his days with ghoulish and ghastly forms of recreation, enjoying life and all its pleasures to the fullest. See them in The Addams Family.
Jasmine dreams of something more than palace life, and she's not afraid to go get it. See them in Aladdin.
Tail's smarts and helpful nature come in handy in a pinch. See them in Sonic the Hedgehog.
Louise Belcher might be just a kid, but she can manipulate just about anyone with a pulse. All in the name of fun, of course. See them in Bob's Burgers.
What Troy Barnes lacks in common sense, he makes up for with heart. See them in Community.
A believer in the pursuit of justice, Garrus Vakarian hates it when bad guys slip through the cracks of the bureaucratic justice system. See them in Mass Effect.
Javert is an inspector with a single-minded focus: to bring criminals to justice. See them in Les Miserables.
Butters Stotch is a kind-hearted student who likes ladybugs, Charlie's Angels, art class, baby-back ribs, and Little Bunny Foo Foo. See them in South Park.