Because you like Stephen Hawking in The Theory of Everything
Stewie Griffin is just your average evil-genius, talking, sociopathic baby. See them in Family Guy.
Light Yagami has a plan to make a better world, and morals won't stop him. See them in Death Note.
Charming and enigmatic, Amy Dunne takes her love for puzzles to a cunning new level. See them in Gone Girl.
Sydney Bristow is a kick-ass double agent on a mission for revenge. See them in Alias.
Liu Kang spends his days training his body and spirit, seeking to become the ultimate warrior. See them in Mortal Kombat.
He tells you everything you need to know: "I. Am. Groot." See them in Marvel Cinematic Universe.
Howl puts the "tortured" in tortured artist. He just wants to be recognized for his work, but no one wants to trust a boy that sorta looks like a bird. See them in Howl's Moving Castle.
Whatever Sakura Haruno lacks in power, she makes up for in intelligence and bravery. See them in Naruto.
His murderous megalomania aside, Loki is quite charming. Just don't mention his strapping older brother; he's a tad jealous. See them in Marvel Cinematic Universe.
Christian Grey is just as controlling in the bedroom as the boardroom. See them in Fifty Shades of Grey.
Quiet and brooding, Ennis Del Mar keeps his true passions close to the chest. See them in Brokeback Mountain.