Because you like Sally Albright in When Harry Met Sally...
Anakin Skywalker is said to be the chosen one, who will destroy the evil Sith. But he struggles with Jedi ideals as he grows in power. See them in Star Wars Series.
Jack Frost would rather crack a joke or throw a snowball than take anything seriously. See them in Rise of the Guardians.
Melinda May is a woman of few words and many talents. Most of them martial. See them in Marvel Cinematic Universe.
Regina Mills is a cold evil queen turned chilly town mayor. See them in Once Upon a Time.
Part of an elite team of investigators, Abby Sciuto is the happiest Goth to ever work in law enforcement. See them in NCIS.
Humble, caring, and protective, Scott McCall tries to make the best of his newfound status as a werewolf. See them in Teen Wolf.
Not only could Hellboy avenge your death, he'd also have a sense of humor about it and not let it ruin the rest of his night. See them in Hellboy.
A born psychopath, don't expect Michael Myers to understand the difference between right and wrong. See them in Halloween.
Experiment 626 was designed for one thing: to destroy everything he touches. See them in Lilo & Stich.
No one else in fsociety can hack like Elliot Alderson, but the battles being waged in his head are often more than he can handle. See them in Mr. Robot.
Sheldon Cooper is brilliant in every way except, well, interacting with any human being. See them in The Big Bang Theory.
With the loyalty and pluckiness of a puppy, Nana Komatsu is a hopeless romantic. See them in Nana.