Because you like Clementine Kruczynski in Eternal Sunshine of the Spotless Mind
A benevolent madman with a blue box, The Doctor is traveling through time and space to heal the wounds of the universe. See them in Doctor Who.
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.
The quiet, intense Daryl Dixon lets his crossbow do the talking. See them in The Walking Dead.
Phoenix Wright is an easygoing defense attorney who is rarely defensive. See them in Ace Attorney Series .
Aang is already a master airbender and once he learns to manipulate water, earth, and fire, he'll be truly unbeatable. See them in Avatar: The Last Airbender.
Merlin is half awkward teenager, half super-powerful wizard. He serves Prince Arthur of Camelot during the day and illegally learns magic at night. See them in Merlin.
A caring, curious, and considerate android, Vision could crush your skull if he had to. But he'd rather not. See them in Marvel Cinematic Universe.
Sheldon Cooper is brilliant in every way except, well, interacting with any human being. See them in The Big Bang Theory.
Ben Barber is ready to show you that he's twice the man you think he is. See them in Ride Along.
Alison DiLaurentis believes you're always better off with a really good lie. See them in Pretty Little Liars.
Edward Elric has a quick mind along with a quick temper. See them in Fullmetal Alchemist.