Because you like Optimus Prime in Transformers
Donkey is proof that if you're annoying enough you can change the world; he's the reason that his friend Shrek does, well, anything. See them in Shrek.
Lyra Belacqua is prone to getting in trouble, but she's also clever enough to get out of it. Most of the time. See them in The Golden Compass.
Motivated by a strong sense of curiosity, fleet-footed Lina Mayfleet is happiest when she's on the move. See them in The City of Ember.
The quiet, intense Daryl Dixon lets his crossbow do the talking. See them in The Walking Dead.
While Jay Gatsby doesn't necessarily like to attend his parties, he knows how to throw a world-class bash. See them in The Great Gatsby.
Dory is more than a little forgetful, but she'll always remember to have your back. See them in Finding Nemo.
A loyal assistant to Nelson and Murdock, Karen Page has a way of finding trouble. See them in Marvel Cinematic Universe.
An infamous vampire, Alucard is a one-man killing machine with a philosophical side. See them in Hellsing.
Chewbacca is a loyal co-pilot who won't hesitate to rip your arm off. See them in Star Wars Series.
Jack Skellington is a nightmare-man with a soft heart and smooth voice. See them in The Nightmare Before Christmas.
A vain and arrogant womanizer, Roy Mustang has hidden depths. See them in Fullmetal Alchemist.