Because you like Leonard Hofstadter in The Big Bang Theory

Roger Kint is a nervous, weak, ham-handed criminal. We think. See them in The Usual Suspects.

After becoming accepted into the group of popular girls, Tracy Freeland has turned from a sweet and reserved teenager into a monster. See them in thirteen.

When the going gets tough, Dre Johnson gets tougher. Well, he'd like to think he does. See them in Blackish.

Will Herondale is an emotionally distant bad boy with a secret. See them in Clockwork Angel .

Villanelle is a hired assassin who loves committing murder as much as she loves dressing up in fancy pink ballgowns. See them in Killing Eve.

Can you be reckless and still be in control? Neil McCormick hopes so. See them in Mysterious Skin.

Dimitri Belikov is a stoic vampire guardian who has the reserve, focus, and discipline of a soldier. See them in Vampire Academy .