What skrewed Sonic big time for me in the 3D versions was the fact that they didnt give you the same freedom to use Sonic\'s speed as much as in the 2D versions.
The camera playied tricks on you, there were too many obstacles in your way you couldnt avoid easily without sucrificing a lot from your speed, and many times you even hesitated to speed up because it was easy to end up yourself off the platform and die.