Most addictive games of the decade, huh?
Well DEFINITELY SADX, SA2B and Heroes! And heck were the two riders games addictive!
Unleashed and Colors were addictive too, and at one stage I was stuck into the three advance games for quite a while. And when Sonic 4 Episode 1 came out recently, I was just playing that game for the next 2 months.
Ive never played Next-Gen, Secret rings, black knight or Shadow the Hedgehog (yeah, screw me), and I never really got stuck into the rush games, or any other sonic games made this decade. But not dissing them or anything!!
P.S. That warning about the 30 days and the necromancy when I try to sometimes post a comment is a bit... awkward.