Because you like Marshall Eriksen in How I Met Your Mother

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.

Even the smallest person can change the course of the world, if he's brave enough. See them in The Lord of the Rings.

Though seemingly caring and calm, this motel owner has a mysterious streak of intensity. See them in Psycho.

Clementine Kruczynski thinks that too many guys think she's a concept, or she completes them, or she's gonna make them alive. See them in Eternal Sunshine of the Spotless Mind.

Curiosity and compassion aren't always to Jonas' advantage. See them in The Giver.

Daisy Buchanan is beautiful and rich, and seems to have it all. But beneath the glitter and the glam, things are more complicated for her. See them in The Great Gatsby.

Zeratul is cryptic, mystic, and not to be messed with. See them in StarCraft .

Needles Kane says shut up and bleed. See them in Twisted Metal .

Kind and friendly, Rinoa Heartilly is nonetheless an effective freedom fighter. See them in Final Fantasy Series.

Eponine is a scrappy street urchin with a bad case of unrequited love. See them in Les Miserables.

Hans Landa doesn't seem to have issues with Jews, but he hunts them because he's determined to do his job well. See them in Inglourious Basterds.

Liv Moore is a sarcastic high-achiever turned morally conflicted zombie. See them in iZombie.