Because you like Clementine Kruczynski in Eternal Sunshine of the Spotless Mind
Milo Thatch is an enthusiastic researcher without cynicism. See them in Atlantis: The Lost Empire.
Angela Martin is uptight and puritanical, outside of the affair she's having with a co-worker. See them in The Office.
V is a violent anarchist with literally nothing left to lose. But, he might have a point. See them in V for Vendetta.
Red doesn't like to explain herself. She wants her work to do the talking. See them in Transistor.
Fiery, intelligent, and opinionated, Jo March rebels against the restrictions of her era. See them in Little Women.
With a song always on her lips and her heart on her sleeve, Maria von Trapp is the governess every kid dreams of. See them in The Sound of Music.
Cosette is an idealistic woman whose innocence stands in contrast to her harsh childhood. See them in Les Miserables.
The only thing that can match Rose's looks are her hot temper and free spirit. See them in Titanic.
Stubborn, impulsive, and fun-loving, Hallie Parker is not afraid to devise some schemes to bring her family together. See them in The Parent Trap.
Underneath his preening narcissist exterior, Schmidt is, well, still kind of a preening narcissist. But he has a good heart too. See them in New Girl.
The self-described "ghost with the most" knows the ins-and-outs of specter life like no other. Just ask him. See them in Beetlejuice.