I thought SA, SA2, Sonic Rush, Sonic Rush Adventure, and Sonic Unleashed were all good--I won't specify which ones I think are better than good due to lack of time in typing this message. I haven't played Sonic Chronicles, but knowing it's by BioWare can't make it all that bad, could it?
But, anyways, I like what Sonic Team did with Sonic Unleashed for the most part and can only hope that Sonic's games can get even better, though I have a bad feeling that SEGA thought they did their best with Sonic Unleashed and thus won't make a game better than it for at least another ten more years, despite Sonic Unleashed not being as good as all the other Sonic games I mentioned in my first sentence.
I can only hope that Sonic games keep getting better. We shall see.