Thoughts on sonic adventure 2?
I think it's more than the sum of it's parts. Isolating elements of gameplay for individual criticism shows most are flimsy and don't really work. However i would be lying if i say i don't have fun when playing it.
Every 2 or 3 years i get obsessed with it and play it to completion, then play it some more for A ranks.
Sonic and Shadow stages are good overall with the main exception being Final Chase.
Knuckles and Rouge could be better if they were scored under different criteria instead of using the time and rings of Sonic and Shadow, as you don't know how to beat the stage from the beginning like on those, so scoring time is a mistake.
Tails and Eggman can be fun although i don't think a single Tails stage is good or even fun. My main complain on these is that losing all your rings when hit is too harsh a punishment for a design where you are going to get hit almost inevitably.