Because you like Bumper Allen in Pitch Perfect

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.

Steven Universe is an excitable youth who likes junk food and trying to save the world. See them in Steven Universe.

With a unique ability to empathize with killers, Will Graham helps society but his sanity pays the price. See them in Hannibal.

An exuberant prankster, Naruto Uzumaki craves acknowledgement of any kind. See them in Naruto.