Because you like Bridget Jones in Bridget Jones's Diary
With his perfectly combed hair and flashy military outfits, France can charm the pants off of anyone—well except his fellow nations, it seems. See them in Axis Powers Hetalia.
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.
Howard Wolowitz is an engineer whose serious mommy issues somehow haven't dimmed his confidence. See them in The Big Bang Theory.
Chicken resterauntier by day and drug overlord by night, Gus Fring doesn't let the stress of living a double life get to him. See them in Breaking Bad.
Kelly Kapoor's interests are office gossip, pink (the color), Pink (the singer), snow cones, the temp Ryan, and "basically, anything that is awesome." See them in The Office.
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.
There's nothing like discovering dear old dad is a serial killer to send you into an (understandable) funk. See them in Hannibal.
Patrick's time as a fake psychic made him a master manipulator. But he now seeks to only use his talent for good. See them in The Mentalist.
Red doesn't like to explain herself. She wants her work to do the talking. See them in Transistor.
Mikey Waters would rather sell his body than rob anybody. See them in My Own Private Idaho.
The core of Satoru Gojo's techniques lies in Limitless, a method that uses cursed energy to control space. See them in Jujutsu Kaisen.