I think that Romney had feelings very similar to mine on a number of issues almost right up until the day he decided to run for office. So part of me could say "well, it's just for the campaign, hopefully he'll revert if elected" - but I think we know now, that he won't do that, because until a president is elected a second term, they're still running for office. So I can't vote for Romney. I dislike both the flip, and where he now stands on most of these issues. I like what I've heard re: his thinking on the auto bailout, but his criticism of the economic stimulus package months after he supported it runs much like his mandate/no mandate on healthcare, altered to fit his In that manner, he's John McCain (2004 v. 2008) and John Kerry all over again.
So as it stands now, I'm practically at polar opposites socially with 'presidential candidate' Romney. And, in broad strokes, and from what I recall, I don't like his stances on education, gun control, the environment, Bush tax cuts, and taxes in general, healthcare reform and Iraq, where i don't think anything we do well lead to long-term democracy there, and I think we should never have been there.
And if anyone is going to tell me they're going to cut taxes and spending, you have to enumerate where, and how much, for it to mean anything.
So it's Obama for me, in the hopes that he'll be better in a second term, and in many ways I think he can be.