Because you like Lennie Small in Of Mice and Men
Will Turner is an earnest, lovelorn blacksmith's assistant with an adventurous spirit. See them in Pirates of the Caribbean: the Curse of the Black Pearl.
Charles Xavier is a telepath who believes mutants and humans are both good at heart and can live in harmony. See them in X-Men Series.
Willow Rosenberg may be a witch who can defeat the forces of evil, but she still gets emotional over kittens on the Internet. See them in Buffy the Vampire Slayer.
Once a lonely hat maker, Sophie Hatter is now cleaning goo from bathtubs and cooking breakfast for the grumpiest wizard in all the land. See them in Howl's Moving Castle.
A ball of cheerful energy, Pinkie Pie is as sweet as her name suggests and lives to bring others joy with laughter and parties. See them in My Little Pony.
Susanna Kaysen is an aspiring writer, despairing young woman who struggles with suicidal thoughts. See them in Girl, Interrupted.
Nadine Franklin likes to wallow in her misery almost as much as she likes to torment her mother. See them in The Edge of Seventeen.
A secret smoker, Margot Tenenbaum has plenty more secrets where that came from. See them in The Royal Tenenbaums.
Holly Golightly spends so much time trying to be other people's dream girl, she doesn't really know what kind of girl she actually is. See them in Breakfast at Tiffany's.
Patrick Verona is a bad boy who's after a tough girl. See them in 10 Things I Hate About You.
The only defense Earth has against alien invaders are giant robots in the hands of pilots like Kaworu. See them in Neon Genesis Evangelion.