Because you like Donna Noble in Doctor Who

Father to a murdered son and husband to a murdered wife, Maximus Decimus Meridius will have his vengeance. See them in Gladiator.

Always headed towards adventure, Goku is frequently with a band of loyal companions at his side. See them in Dragon Ball.

Be careful around Marie Laveau. There's no one more vengeful than a double-crossed voodoo queen. See them in American Horror Story.

Although Theon Greyjoy is treated well, he's still essentially a hostage. And that isn't so easy for him to forgive. See them in Game of Thrones.

Other people's opinions have never mattered much to Haruka Nanase, and they aren't going to start to do so now. See them in Free! Iwatobi Swim Club.

It's certainly easier to get great footage of crimes when you can guarantee they'll happen. See them in Nightcrawler.

A super-soldier, Master Chief might be more machine than man. And for humanity's sake, thank God. See them in Halo.

Edward Kenway can be reckless and greedy, but he's learning that his ancient ancestry carries a noble burden. See them in Assassin's Creed Series.

A rugged frontiersman and consummate survivor, Hugh Glass has a relationship with the natural world that is downright spiritual. See them in The Revenant.

Armin Arlert was wrong. This world hasn't become hell; it's been hell. He just couldn't see it before. See them in Attack on Titan.

Carl Gallagher is a budding psychopath fascinated with rule breaking. See them in Shameless.

His superiority complex coupled with his bitter desire for revenge makes Vegeta a formidable foe. See them in Dragon Ball Z.