Because you like Frodo Baggins in The Lord of the Rings
Told her son will one day save the world, Sarah Connor dedicates her life to training him to do just that. See them in The Terminator.
Mario is a plumber who wears a ridiculous outfit, eats weird looking mushrooms, and fits himself inside your pipes so he can save a princess. See them in Super Mario Bros..
Raphael is a short-fused hothead who loves a good fight and some tasty pizza. See them in Teenage Mutant Ninja Turtles.
He's a dedicated cop and a nice guy. But James Gordon is learning that Gotham is not a city for nice guys. See them in Gotham.
A crooked cop, Harvey Bullock is the product of a not-so-just criminal justice system. See them in Gotham.
Wolverine is a hot-blooded Canadian with an adamantium skeleton who's the best at what he does. See them in X-Men Series.
Rayman is a fearless hero who flies into action with a propeller on his head and a smile on his face. See them in Rayman.
Larger than life and wealthy beyond measure, Willy Wonka is more than a titan in the sweets industry; he is an arbiter of taste. See them in Charlie and the Chocolate Factory.
Hawkeye is most comfortable perched above the action, keeping an eye on everything and using a well-timed arrow to save the day. See them in Marvel Cinematic Universe.
Jason Bourne is suffering amnesia, but considering what he's done as a CIA assassin, maybe that's for the best. See them in The Bourne Identity.
With an A.I. as loyal and witty as Cortana, who needs humans? See them in Halo.
Severus Snape is a misanthropic potions teacher with a vindictive streak. See them in Harry Potter Series.