Because you like Kathleen Kelly in You've Got Mail
There's never a dull moment when this mischievous high-schooler gets up to his hijinks. Save Ferris! See them in Ferris Bueller's Day Off.
Daria Morgendorffer is so defensive that she actively works to make people dislike her so that she don't feel bad when they do. See them in Daria.
Bridget Jones is a wanton sex goddess, struggling 30-something, and semi-hot mess. See them in Bridget Jones's Diary.
There is never a dull moment with Jim Moriarty: expect booze and sing alongs in between all of the homicide. See them in Sherlock.
A hurricane of a human being, Marla Singer is destructive and unforgettable. See them in Fight Club.
A house elf, Dobby is loyal, compassionate, and yearning for freedom. See them in Harry Potter Series.
Intelligent and compassionate, Hazel Lancaster would rather face things, even bad things, than sugarcoat the truth. See them in The Fault in Our Stars.
Bumbling, jolly, and loyal, Rubeus Hagrid has the uncanny ability to make the best of a bad situation. See them in Harry Potter Series.
While Jay Gatsby doesn't necessarily like to attend his parties, he knows how to throw a world-class bash. See them in The Great Gatsby.
Jim Halpert is a master at the art of making it through the work day, including participating in an office Olympics. See them in The Office.
Even the smallest person can change the course of the world, if he's brave enough. See them in The Lord of the Rings.