Because you like Jason Voorhees in Friday the 13th
Walter White's knowledge of chemistry allows him to cook astoundingly pure meth, leading to a rapid – albeit tumultuous – rise in the criminal drug world. See them in Breaking Bad.
Sabriel is smart enough to understand the dangers that await her and brave enough to face them anyway. See them in Abhorsen Series.
Somehow all of Lara Jean Covey's past crushes know everything she's ever felt about them. Embarrasing? Yes, but hey, now she has a boyfriend. See them in To all The Boys I've Loved Before.
There is never a dull moment with Jim Moriarty: expect booze and sing alongs in between all of the homicide. See them in Sherlock.
Burton Guster is a level-headed investigator with a "Super Sniffer" nose. See them in Psych.
As high-strung as she is talented, Rachel Berry both marches and sings to the beat of her own drum. See them in Glee.
The last war left his economy devastated, and now Germany is engaged in another war and stuck with two barely trained allies for help. See them in Axis Powers Hetalia.
Blaine Anderson is a put-together prep school boy with the voice of an angel. See them in Glee.
Fighting for a future without fear? Yeah, Chris Redfield believes it is worth it. See them in Resident Evil Series.
As a doctor-in-training, John Dorian should have his head in the game. But most of the time, it's in the clouds. See them in Scrubs.
Peter Kavinsky is a jock who only cares about getting back at his ex, or so he says. See them in To all The Boys I've Loved Before.