Mario. Both of them are cool, but I generally prefer Mario games to Sonic games. However, both of them are the stars of two different series that are both going downhill in two different ways. Mario has more spn-off games than actual, true blue adventures. Sonic's games are getting dirtier and in general, crappier. Hmm....maybe it's the crap making it dirty?
One thing I
don't like about Mario is he sorta....acts like a toddler. It seriously gets annoying to keep hearing "Yahooo!" or "Yipee!" all the time. In fact, it can be kinda embarassing o play a handheld Mario game in public because of that. Just try playing Mario VS Donkey Kong in public.
Reeeeally annoying.
Sonic usually as really corny dialogue though. Mario has "Niiiiiiiiiiiiiiintendo, whoo-hoo!" which is fun to say. Whoever knows what game that's from, PM me for your prize.