I stopped playing major sonic games around when Sonic Heros came out, and that game wasn't that good. The last really good sonic game was sonic adventure (and even that is probably due to nostalgia, and being the first truly 3d sonic game I played, and I was really hyped up about), I enjoyed sonic adventure 2 more for raising chaos

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I played Shadow the Hedgehog and I didn't enjoy it. None of the new ones look good at all.
Also Sonic and the Secret Rings I own, but to me it isn't a real sonic game. Last I remember is being on the 3rd level, the graphics were good, but control is so limited.
OMG I love chaos Im like the master at raising them ive made every type in every color and all that I Love them YES YES YES YES MORE CHAOS They should make a game about chaos for all i care IT WAS A