Because you like Donkey Kong in Donkey Kong
He's an everyday earthworm turned intergalactic hero. See them in Earthworm Jim.
Wario is greedy, gross, and gluttonous. See them in WarioWare.
Simon Belmont is a vampire hunter bravely carrying on the family business. See them in Castlevania.
Fox McCloud leads a team of pilots through the Lylat System in search of the evil genius Andross, the villain that killed his father. See them in Star Fox.
A courageous boy robot, Mega Man is dedicated to achieving everlasting peace. See them in Mega Man.
M. Bison is a diabolical megalomaniac hell-bent on dominating the world. See them in Street Fighter.
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.
Meat Boy tenaciously throws himself into danger, and when he fails, he immediately gets back up and tries again. See them in Super Meat Boy.
Crono may not talk, but this time-traveling hero's heart speaks volumes. See them in Chrono Trigger.
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..
Spyro the Dragon loves getting into trouble around the Dragon Realms. See them in Spyro the Dragon.
A great galactic bounty hunter, Samus Aran is not as good at expressing emotions. See them in Metroid.