Because you like Willow Rosenberg in Buffy the Vampire Slayer
Walter White's knowledge of chemistry allows him to cook astoundingly pure meth, leading to a rapid – albeit tumultuous – rise in the criminal drug world. See them in Breaking Bad.
Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.
Duck, girl, and legend: Ahiru's identities confuse even herself at times, and she often wonders which of them is truly her. See them in Princess Tutu.
Neal Cassidy is a charming former thief with a heroic side. See them in Once Upon a Time.
Aslan represents everything good and just, he's just not super reliable. See them in The Chronicles of Narnia.
Eleanor puts up a tough front, even when everyone else tries to tear her down. See them in Eleanor and Park .
Joey Potter is a low-key girl next door in love with her best friend. See them in Dawson's Creek.
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.
Mark Sloan is the best plastic surgeon and biggest playboy the hospital's ever seen. See them in Grey's Anatomy.
A photographic memory is just one of many skills Lexie Grey brings to the table as a surgeon. See them in Grey's Anatomy.