I'm both as well, i'm not that big of a Sonic fan i used to be, but i still enjoy the blue hedgehog games a lot. But i remember when i drew a LOT of Sonic art during high school. During that time, dA flooded with fan-characters. And the fan-art that were just mind blowing (Just like MLP is now). But i kept noticing several artists,that i liked there, suddenly writing journals on how bad the sonic community is and how retarded people act. And i couldn't help but agree to some points. Though, the same goes for the brony community. People in this community are incredible, but a minority of people just takes it down by annoying others on Youtube, DeviantART etc. Oh well, I like them both, like i said! Also, Sonic and Rainbow Dash are pretty awesome together.
Source: http://archiecomicssonicfanon.wikia.com/wiki/File:5624_-_crossover_rainbow_dash_Sonic_the_Hedgehog.JPG