Because you like Henry DeTamble in The Time Traveler's Wife
It is a truth universally acknowledged that Elizabeth Bennet doesn't suffer fools or prideful men. See them in Pride & Prejudice.
After surviving consecutive fights-to-the-death (damn you, President Snow!), Katniss Everdeen is thrust to the front lines of a real war. See them in The Hunger Games .
If Lisbeth Salander can hurt a bastard who deserves it by digging up stuff about him, she feels good. See them in The Girl with the Dragon Tattoo.
Diana Prince is using a truth-telling lasso and super-strength to make Earth a little more like Paradise. See them in DC Extended Universe.
It turns out the girl of your dreams just might have dreams of her own. See them in (500) Days of Summer.
Chaos is what killed the dinosaurs, and there's nothing Jason "J.D." Dean loves more than chaos. See them in Heathers.
There is never a dull moment with Jim Moriarty: expect booze and sing alongs in between all of the homicide. See them in Sherlock.
Number Five is a 58-year-old man trapped in his 13-year-old body. See them in The Umbrella Academy.
Alyssa Foley is a blunt and crass teenage runaway. See them in The End of the F World.
Leonidas is not the kind of king who merely gives orders; rather, he's out on the battlefield fighting alongside his men. See them in 300.
Fiery, intelligent, and opinionated, Jo March rebels against the restrictions of her era. See them in Little Women.