Because you like Optimus Prime in Transformers

Hayley Stark is a sarcastic 14-year-old with an unusual passion. See them in Hard Candy.

Shaggy might be a bit of a slacker, but his heart and his stomach are usually in the right place. See them in Scooby-Doo.

Susan Pevensie is sensible, practical, and fiercely protective of those she loves. See them in The Chronicles of Narnia.

Christian is a romantic who for some reason won't stop singing everything he feels. See them in Moulin Rouge.

A passionate paleontologist with interests no one seems to share, Ross Geller tries to find love despite his past of abandonment and an awkward personality. See them in Friends.

A contemptuous aristocrat, Violet Crawley is unafraid to exert her authority and voice her opinions, no matter how harsh they are. See them in Downton Abbey.

Howard Wolowitz is an engineer whose serious mommy issues somehow haven't dimmed his confidence. See them in The Big Bang Theory.

You don't teach a class called "How To Get Away With Murder" without knowing a thing or two about getting away with things. See them in How to Get Away with Murder.

Cosette is an idealistic woman whose innocence stands in contrast to her harsh childhood. See them in Les Miserables.

Cosima Niehaus loves exploring the unknown. Even her own DNA is a puzzle, waiting to be unlocked. See them in Orphan Black.

Andy Dwyer might not be completely literate, but he makes up for it in spirit. See them in Parks and Recreation.