I know it's been a while since this post was touched, so I'll make things short.
As awesome as de Blob 2 was, it didn't feel as good, because you had presumably played through the first already. I think this is because it didn't bring much new to the table, apart from 2D side scrolling. The thing is, de Blob 2 was better in my opinion, but you had to give it time. I finished #2 four months ago, but I bought it very close to release. It felt fresh again, compared to all the other stuff I was playing, and was obscenely full of content rather than just adding side missions like the first game.