Because you like Christopher John Francis Boone in The Curious Incident of the Dog in the Night-Time
England may cultivate the image of a well-bred gentleman, but he has both the temper and mouth of a seasoned sailor. See them in Axis Powers Hetalia.
Sabrina Spellman is half-witch-half-human, a headstrong and loyal cheerleader with an affinity for spell-making. See them in Chilling Adventures of Sabrina.
James Wilson is a compassionate doctor who willingly plays the sidekick. See them in House M.D..
Though he may be blind, Chirrut Imwe sees the power of the force more than most. See them in Rogue One.
Megamind is searching for purpose in a supervillain life without a superhero to fight. See them in Megamind.
Derek Hale is not one to make allies easily. This moody werewolf is dark and brooding. See them in Teen Wolf.
A believer in the pursuit of justice, Garrus Vakarian hates it when bad guys slip through the cracks of the bureaucratic justice system. See them in Mass Effect.
Nadine Franklin likes to wallow in her misery almost as much as she likes to torment her mother. See them in The Edge of Seventeen.
It's certainly easier to get great footage of crimes when you can guarantee they'll happen. See them in Nightcrawler.
A dedicated hedonist, Jack Harkness appreciates raunchy stories, stiff drinks, and excellent bottoms. See them in Doctor Who.
A ball of cheerful energy, Pinkie Pie is as sweet as her name suggests and lives to bring others joy with laughter and parties. See them in My Little Pony.