Currently playing Sonic the Hedgehog (for the 360) and I can officially declare that it has some awesome fun moments, especially the new "Silver" the hedgehog's first mission, which is a blast. Sonic sections are bit whacky and sometimes just not that great, while shadow's segments I just plain hate.
Overall, though, it's a terrible game, for many reasons.
Also hoping to play through Halo 2 again, before the third comes out.