Because you like Joel Barish in Eternal Sunshine of the Spotless Mind
Toby Cavanaugh has trouble avoiding being manipulated. See them in Pretty Little Liars.
Anastasia Steele's new boyfriend Christian might as well come with a warning label that reads "Beware: Severe Issues That Might Warrant a Trip to Dr. Phil." See them in Fifty Shades of Grey.
The Grinch's heart is just too small to appreciate Christmas. See them in Dr. Seuss' How the Grinch Stole Christmas.
It's a race against time to develop his theory of the origins of the Universe before Stephen Hawking's body and mind give out. See them in The Theory of Everything.
Carol Aird is driven to fight to make her life better, regardless the consequences. See them in Carol.
A secret smoker, Margot Tenenbaum has plenty more secrets where that came from. See them in The Royal Tenenbaums.
The incomplete experiment of an inventor, Edward Scissorhands was left with blades instead of hands and an unpolished understanding of the world. See them in Edward Scissorhands.
There's erratic, and then there's Senor Chang. See them in Community.
Murph is inquisitive, compassionate, and stubborn, with a passion for science she shares with her dad. See them in Interstellar.
A karate master/rocket scientist/squirrel, Sandy Cheeks is the only one who can clean up the other resident's messes in Bikini Bottom. See them in SpongeBob SquarePants.
Mitchell Pritchett prefers to have a place for everything and everything in its place. See them in Modern Family.
Caleb Rivers is a bad boy with a good reason for acting out. See them in Pretty Little Liars.