I believe than a public healthcare system is much more efficient than a private one, I am thankful I live in a country with one of the best public healthcare systems (Spain) in both quality and cost-effective, and I have noticed that all attempts for privatizing increased the costs and reduced the quality. So I think Obamacare is a great idea. I know it is not a health nationalization program at all, but it is a small advance in that direction.
I think Obama certainly had the goodwill of being a much more peaceful and diplomatic president than Bush, but the circumstances did not allowed him to do that. I am not comparing Bush and Obama military policies, Libya and Irak operations are very different, and it is very soon to value interventions in Syria.