As I see it...it depends.
On the one hand, if "Obamacare" is going to cause more harm than good, I hope it fails. Unless failing causes more harm than succeeding, in which case I hope it doesn't fail.
On the other hand, if "Obamacare" is going to do more good than harm, I hope it succeeds.
The problem is defining what good is and what harm is, which no one is able to do.
That, and successfully predicting the future.