Because you like Vegeta in Dragon Ball Z
Oliver Tate is extremely articulate but hopelessly awkward. That's not a recipe for teenage happiness. See them in Submarine.
Serena van der Woodsen is a wild child. Too wild, her friends and family might argue. See them in Gossip Girl.
Celine's a spontaneous Parisian college student enjoying the night of her life. See them in Before Sunrise.
Tom Hansen is a full-fledged romantic impatiently waiting for his love story. See them in (500) Days of Summer.
You'll never get Alaska Young. And that's the whole point. See them in Looking for Alaska.