Because you like Lisbeth Salander in The Girl with the Dragon Tattoo

Faith has a chip on her shoulder and a stake in her hand to slay vampires in her town. See them in Buffy the Vampire Slayer.

Veronica Lodge is a sophisticated girl who always, no matter what, absolutely gets what she wants. See them in Archie Comics.

Cinder has been beaten down by the world, but she's learning that her cyborg abilities are pretty helpful. See them in Cinder .

John Locke is an eerily calm, confident believer in the magic of the island that gave him his legs back. See them in Lost.

Margaery Tyrell is one of the most adept and charming liars there is. See them in Game of Thrones.

Jacob Black is the boy next door who's also the wolf next door. See them in Twilight.

After figuring out how both the light and dark halves of his soul could co-exist, Jak is maturing into a real hero. See them in Jak and Daxter.

Betty Cooper seems like a sweet girl, but she also has a dark side and can go beyond what's safe or sane. See them in Archie Comics.

Captain Spock is on a five-year mission exploring the final frontier and boldly going where no man has gone before. See them in Star Trek.

Maurice Moss is a dedicated IT guy who even talks like a computer. See them in The IT Crowd.

Dr. Gordon Freeman is a brilliant physicist is a quiet hero. And given all the violent aliens, he better be. See them in Half-Life.

Cyclops shoots lasers out of his eyes, destroying anything in his line of sight. See them in X-Men Series.