Sonic Adventure 1 and 2 were both actually fairly good games in my opinion. Not to say that they could ever beat the original 3 sonic games; nothing ever could. After that, they remade the two for the gamecube and got really self-confident after that, and thus decided to create the worst game of the series; Shadow the Hedgehog. Never give an anthropomorph(sp?) known for speed a gun. More importantly; stop making new Sonic Characters. Sonic belongs in 2D, there's just no way around it. I can't really say my least favorite game in the 3D pool, all I know is that it isn't Sonic Adventure 1 or 2. The series still has its legs; The GBA games were pretty good and faithful, and also added a few new thing to the mix, but just stick with the fantastic formula of the originals. Perhaps a dosage of Megaman-9-Syndrome is in order?