Because you like Calvin Palmer in Barbershop
Whatever Sakura Haruno lacks in power, she makes up for in intelligence and bravery. See them in Naruto.
Nicholas Angel is super-dedicated to his job as a police officer. Maybe a little too dedicated. See them in Hot Fuzz.
Jasmine dreams of something more than palace life, and she's not afraid to go get it. See them in Aladdin.
Nomi Marks is a brilliant hacker with an open-minded, accepting spirit. See them in Sense8.
A 100-plus-year-old who looks like a dreamy teenager, Edward Cullen warns girls to avoid him, which makes them want him even more. See them in Twilight.
A formerly timid caterpillar, Kurt Hummel is transforming into a glamorous, confident butterfly. See them in Glee.
Anna Karenina doesn't want to be a respectable woman any more. She thinks respect was invented to cover the empty place where love should be. See them in Anna Karenina.
Bedside manner is for chumps, not the brilliant Dr. Gregory House. See them in House M.D..
Milo Thatch is an enthusiastic researcher without cynicism. See them in Atlantis: The Lost Empire.