Because you like Alex DeLarge in A Clockwork Orange

A bloodsucker, Carlisle Cullen is actually more likely to give you a blood infusion. See them in Twilight.

A childlike space cadet, Brittany Pierce has a surprisingly open-minded spirit. See them in Glee.

Charlotte York is an idealistic art curator who loves horses, tennis and Elizabeth Taylor movies. See them in Sex and the City.

Gretchen Wieners is the gossip queen in her clique. See them in Mean Girls.

A crabby troll, Karkat Vantas is perpetually angry about his lot in life. See them in Homestuck.

John Watson is haunted by his past (who isn't) but he's starting to branch out with some help from a world class detective. See them in Sherlock.

A passionate paleontologist with interests no one seems to share, Ross Geller tries to find love despite his past of abandonment and an awkward personality. See them in Friends.

A blood-thirsty warrior on the battlefield, Ragnar Lothbrok is a dedicated family-man at home. See them in Vikings.

Mako is carrying the world on his shoulders. See them in The Legend of Korra.

While Cassie Ainsworth's head is always in the clouds, her heart is always in the right place. See them in Skins.

Winry Rockbell is an energetic tomboy mechanic with an empathetic streak. See them in Fullmetal Alchemist.

Given his ability to wrench street signs from the ground, Shizuo Heiwajima is a useful one to have in dangerous Ikekuburo. See them in Durarara!!.