Because you like Khan Noonien Singh in Star Trek Into Darkness

Although Jareth seems like he's just a harmless romantic, his powers make him a formidable foe. See them in Labyrinth.

A kind and funny valedictorian, Gwen Stacy likes to make out with Spider-man when her homework's done. See them in Marvel Cinematic Universe.

Poison Ivy is a seductive, venomous botanist laments the fact that there are so many people to kill, yet so little time. See them in DC Extended Universe.

Donna Carmichael is a free-spirited single mom and gracefully aging hippie. See them in Mamma Mia!.

Good-natured, sensitive, and introspective, Mason is on a lifelong path to finding himself. See them in Boyhood.

Given his ability to wrench street signs from the ground, Shizuo Heiwajima is a useful one to have in dangerous Ikekuburo. See them in Durarara!!.

Serena van der Woodsen is a wild child. Too wild, her friends and family might argue. See them in Gossip Girl.

Mario is a plumber who wears a ridiculous outfit, eats weird looking mushrooms, and fits himself inside your pipes so he can save a princess. See them in Super Mario Bros..

Larger than life and wealthy beyond measure, Willy Wonka is more than a titan in the sweets industry; he is an arbiter of taste. See them in Charlie and the Chocolate Factory.

Princess Fiona is a damsel who doesn't need saving, but she's cursed with an embarrassing secret. See them in Shrek.

An agile and powerful swordswoman, Saber is a dignified warrior down to her bones. See them in Fate/Stay Night.

The vampire that killed Zero Kiryu's family also infected him, and he starts to crave blood, much to his horror. See them in Vampire Knight.