I dunno, for some odd reason If it has Sonic on it I HAVE to play it, I just love those games, the 3D ones started getting bad ONLY because it was bug ridden, and the 2006 being the worst since it had long loading times, DBZ cookie cutter story, and Bugs out the yin-yang, But I file it under the are I call "Games that are potentially awesome yet suck", Colors Redeemed the 3d Franchise as it took Unleashed and removed the non-sensical Were-hog Parts (good attempt though), Sonic 4 wasn't bad, it also wasn't that good either, my main issue was the music, it didn't sound right. all the handheld ones ranger from really good to not that bad, yet again, colors for the DS took the Rush format and made it really fun.
Generations will be without a doubt one of the BEST GAMES EVER for the Xbox360, Ps3, PC, and 3DS!
3D Blast wasn't THAT bad, but it was hard for the wrong reasons.