I thought the gameplay in the first game sucked, I will wait for the sequel to drop to $20 before trying it so I don't get fooled by reviews like I did for the first. I would have considered this bundle if it was $60, no chance I would even consider paying $80 for it.
I do like the Gonzo costume though.
Little Big Planet's platforming physics are definitely an acquired taste. One thing that is important to realize is that the more sticky platforming that Mario has always pioneered is also an acquired taste, we are all just used to it.
If I had to pick, I would say I prefer Mario's physics more, but I don't dislike Little Big Planet. I have several family members, including my wife, that have just recently been introduced to platformers. I've played both NSMB and LBP with them. I'm surprised the number of them that do actually prefer LBP. While the floatiness is frustrating for us, it actually often translates as forgiving to newcomers.
So yeah, I dont' think either style is wrong, and I appreciate playing both of them on occasion.
If it isn't the floatiness that bothers you, then it has to be the depth changing. And if that's the case, I'll say to you what I say to everyone. It's frustrating in the beginning. But battle through it and you will eventually grasp what and how the engine autoshifts your character between depths. Once you fully grasp this, the frustration almost entirely melts away.