Because you like Joey Gladstone in Full House
Smart, sarcastic, and loyal, Stiles Stilinski doesn't just want to be the sidekick in someone else's life. See them in Teen Wolf.
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.
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.
Ciel Phantomhive is a haughty teenage nobleman who doesn't suffer fools gladly. See them in Black Butler.
Sebastien Michaelis is a demonic butler who approaches life with effortless finesse and a diabolical streak. See them in Black Butler.
Edward Elric has a quick mind along with a quick temper. See them in Fullmetal Alchemist.
An exuberant prankster, Naruto Uzumaki craves acknowledgement of any kind. See them in Naruto.
The son of Death has an obsession with perfection and symmetry. See them in Soul Eater.
Good fashion? Check. Snarky quips? Check. Supernatural evil-fighting powers? Also check. See them in Buffy the Vampire Slayer.
An escaped convict on a mission, Sirius Black is brooding, brave, and reckless. See them in Harry Potter Series.