Because you like Mario in Super Mario Bros.
Donkey Kong is a strong, banana-loving, and caring uncle to Diddy Kong. See them in Donkey Kong.
Wario is greedy, gross, and gluttonous. See them in WarioWare.
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.
A speed-loving daredevil who lives on the edge, Sonic is as brave as he is cocky. See them in Sonic the Hedgehog.
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.
M. Bison is a diabolical megalomaniac hell-bent on dominating the world. See them in Street Fighter.
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.
Simon Belmont is a vampire hunter bravely carrying on the family business. See them in Castlevania.
Clank is the quintessential rational, intelligent robot sidekick. See them in Ratchet & Clank.
Ratchet is a shoot-first, ask-questions-later, and then-shoot-again kind of lombax. See them in Ratchet & Clank.
A great galactic bounty hunter, Samus Aran is not as good at expressing emotions. See them in Metroid.