Because you like Eric Northman in True Blood
Michaelangelo is an above-ground crime-fighter by night, and a pizza-eating, sewer-dwelling mutant ninja turtle by day. See them in Teenage Mutant Ninja Turtles.
Emmet Brickowski is so upbeat it's not even human. Everything is AWESOME! See them in The Lego Movie.
Glenn Rhee somehow never loses his enthusiastic spirit – even in the middle of a zombie apocalypse. See them in The Walking Dead.
A working class janitor with a world-class mind, Will Hunting is cocky, brash, and combative about his future. See them in Good Will Hunting.
An agile and powerful swordswoman, Saber is a dignified warrior down to her bones. See them in Fate/Stay Night.
The Little Prince is a childlike wonder personified in a tiny package. See them in The Little Prince.
Henry Mills is an idealistic young boy with the heart of the truest believer. See them in Once Upon a Time.
Char is always thinking two or three steps ahead of the enemy. See them in Mobile Suit Gundam Series.
Talking to a stranger on a train is the best decision Jesse Wallace ever made. See them in Before Sunrise.
Light Yagami has a plan to make a better world, and morals won't stop him. See them in Death Note.
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.