Because you like Vegeta in Dragon Ball Z
Arthur Dent is an incredibly normal man on an incredibly abnormal adventure. See them in The Hitchhiker's Guide to the Galaxy.
With the loyalty and pluckiness of a puppy, Nana Komatsu is a hopeless romantic. See them in Nana.
When the going gets tough, Rick Grimes gets tougher. It's a very useful trait when the world goes to hell. See them in The Walking Dead.
John Wick is a widowed former Navy Seal who becomes a notoriously effective hitman, killing over 124 people with gunshots alone. See them in John Wick.
Finn is the world's last human who's "all about" understanding right and wrong. See them in Adventure Time.
Liv Moore is a sarcastic high-achiever turned morally conflicted zombie. See them in iZombie.
If you need her, Lisa Simpson will be in her room with her saxophone and a good book. See them in The Simpsons.
Charismatic, sociopathic, and dramatic, Charlie Bronson wants nothing more than to be famous. See them in Bronson.
Even the smallest person can change the course of the world, if he's brave enough. See them in The Lord of the Rings.
N'Jadaka is a righteous man with a violent agenda. See them in Marvel Cinematic Universe.
Alex DeLarge likes his favorite milk-based, drug-laced cocktail. It helps him get in the mood for a night of "ultra violence." See them in A Clockwork Orange.
Blunt, petty, neurotic, Larry David can never live and let live. See them in Curb Your Enthusiasm.