My fave games are Shadow the hedgehog, Sonic unleashed, Sonic colors and Sonic Heros.
And even with games that (kinda) faltered like 2006, the MUSIC IS BOSS!!
seriously, look up Solaris Phase 2 (sonic the hedgehog 2006).
The small problem with heros was, that effectively told you to play the game FOUR TIMES!!!! THAT was unnecessary.