My very first console was a Dreamcast, and to this day I still enjoy playing Sonic Adventure 1 and 2. Modern sonic gameplay is fast paced, looks great and is brilliant fun. I can't help but feel that the 2d gameplay lets the game down though, for 2d gameplay it's the best I've ever played don't get me wrong, but why does Sonic even have this kind of 2d gameplay anymore, I thought we moved on from that?
You zip through the stage as modern sonic, blasting through everything and having a great time, then as soon as a 2d section arrives, you find yourself stopped, waiting for a physics defying hovering platform to rise high enough for you to jump to the next physics defying platform... then you get back into 3d gameplay and off you rocket! I can understand the appeal of 2d sonic games, but I really wish they would separate the 2 types of games and not try to merge them, as it ruins it for both the fans of 3d and 2d, because each far prefer their own favourite :P

That mini rant at 2d aside, the game is brilliant if a little short (only 9 main levels with bosses after each 3), the graphics are incredible and it's lovely see old levels from the past all re-imagined and HD, Speed Highway and City Escape are my personal favourites of course, Rooftop Run is also great fun :)

If you're a sonic fan I highly recommend this game, it's a great tribute to Sonics history, and I very much look forward to Sonics next game!