Because you like Ratchet in Ratchet & Clank
Ethan Hunt's mission, should he chose to accept it, is to save the world from impossible threats. See them in Mission: Impossible.
If you died and came back to life, and then died more times and came back, you might stop battling evil mutants. Not Jean Grey. See them in X-Men Series.
Whether it's punching a meteor or saving a teen from jumping, Superman tries to be in as many places as Kryptonianly possible. See them in DC Extended Universe.
Her unhappy childhood has left her unsure of the existence of happy endings. Mary Jane Watson hides her pain beneath a joke and a smile. See them in Marvel Cinematic Universe.
A daring hacker, Trinity is one of the few rebels who escaped the Matrix, a simulation in which most of humanity is enslaved. See them in The Matrix.
Marv is a brutish but principled thug who'd be right at home on an ancient battlefield. See them in Sin City.
A debonair spy, Harry Hart is the epitome of a gentleman, even when he calmly takes down multiple men with a militarized umbrella. See them in Kingsman: The Secret Service.
Rhodes has to trust his conscience to guide him through a political struggle that could change the very shape of modern warfare. See them in Marvel Cinematic Universe.
The "runt" of his biker gang, Tetsuo Shima grapples with a perpetual inferiority complex. See them in Akira.
A premier member of the leather cat-suit club, Selene can chill you with a stony look, or ice you with her ninja moves. See them in Underworld.
The self-proclaimed "only guilty man in Shawshank prison" has wisdom to share, such as the best way to smuggle a Rita Hayworth poster into a Maine prison. See them in The Shawshank Redemption.
Charles Xavier is a telepath who believes mutants and humans are both good at heart and can live in harmony. See them in X-Men Series.