Because you like Marshall Eriksen in How I Met Your Mother

Did he ever tell you the definition of insanity? Just wait, and this psychopath will do just that. See them in Far Cry 3.

Don't worry about this forensic scientist offing you unless you're a serial killer yourself. (You're not, right? Just checking.) See them in Dexter.

Yuri Plisetsky's a hotheaded punk off the ice, incredible artist on it. See them in Yuri on Ice.

Artemis Fowl understands the way of the world. If he wins, he's a prodigy. If he loses, then he's crazy. That is how history is written. See them in Artemis Fowl.

Few high school students could be less concerned with labels. See them in Ouran High School Host Club.

Will Herondale is an emotionally distant bad boy with a secret. See them in Clockwork Angel .

Nadja was feminasty before it was cool. See them in What We Do In The Shadows.

Everyone is just a chess piece, and Izaya Orihara is a master player. See them in Durarara!!.

You wouldn't know it by looking at her, but beneath Sheila Jackson's sweet, motherly exterior lies a sex addict. See them in Shameless.

Underneath Fakir's sarcastic exterior is a loyal friend. But his loyalty borders on being possessive of his friends. See them in Princess Tutu.

Ezio Auditore Da Firenze is a little short-tempered, a lot fun-loving. See them in Assassin's Creed Series.

Trevor Phillips is an unpredictable maniac who tortures people for no reason. See them in Grand Theft Series.