Because you like Peter Pevensie in The Chronicles of Narnia

Optimus Prime is a shapeshifting sentient robot leading a team of robots to stop evil from taking over. See them in Transformers.

Eponine is a scrappy street urchin with a bad case of unrequited love. See them in Les Miserables.

A daring conman, Flynn Rider is so charismatic that you might not mind when he steals from you. See them in Tangled.

Hiccup Haddock III may be the only Viking nerd in recorded history. See them in How to Train Your Dragon.

Nothing instills more fear in the Empire than the deep kshhh of Darth Vader breathing through his helmet. See them in Star Wars Series.

An assassin with supernatural gifts, Corvo Attano is the last guy you should frame for murder. See them in Dishonored.

China has five thousand years of history, and he's optimistic he'll win over the Allied Powers to the wisdom of his ways. See them in Axis Powers Hetalia.

There are men who embrace destiny and do not show their fear. These are the ones that change the world forever. See them in Dragon Age Series.

People think that because Tris is small, or a girl, or a Stiff, she can't possibly be cruel. But they're wrong. See them in Divergent.

The brilliant and well-adjusted Ender Wiggin is being groomed for the next generation of military leaders to fight alien invaders. See them in Ender's Game.

Years of being a social outcast have taken a toll, but Elphaba is willing to be wicked if it means she can do good. See them in Wicked .