I tried Sonic and All-Stars Racing; to be honest it's just a Diddy Kong Racing competitor (it's closer to that than Mario Kart, in my opinion). It's enjoyable yes, but I suppose the idea of Sonic losing his proper fast speed on foot (ergo, his origin storyline) makes it feel sour in a way.
In your opinion, what would be the most collected group of what you describe as "Sonic fans" on the net? I'm going by what I always see popping up on my Facebook.
P.S. What could you possibly hack on the old Sonic games? I didn't get that score by hacking, after all.