Because you like King Henry V in Henry V
Bella Swan thinks of it as her job to help her parents and protect her friends, even though it often ends up the other way around. See them in Twilight.
A baker turned reluctant fighter, Peeta Mellark can charm his way out of just about any situation. See them in The Hunger Games .
Socialite-turned-runaway-turned-waitress, Rachel Green is the legendary story of riches to rags, trying to work her way up again with the help of her friends. See them in Friends.
With his own ship, Peter Quill calls his own shots, and gets to fly from planet to planet blasting '70s pop hits and picking up alien chicks. See them in Marvel Cinematic Universe.
Tracy Turnblad's got rhythm, and she's determined to share her dance moves with the world. See them in Hairspray.
Usagi Tsukino may look like a lazy teen, but when Usagi conjures up her alter ego and calls her Sailor Scout team, no villain stands a chance. See them in Sailor Moon.
Alison DiLaurentis believes you're always better off with a really good lie. See them in Pretty Little Liars.
Brilliant, violent, and only a little insane, the Joker doesn't listen to anyone except the voices in his head. See them in DC Extended Universe.
Jenko was top dog in high school. Now he's bottom of the pack in the police academy. See them in 21 Jump Street.
Dominic Toretto lives his life "a quarter mile at a time", and he burns through those miles faster than anyone. See them in The Fast and the Furious.