I think the big problem, aside from the social issues and embrace of a specific religion (especially when I'm personally against all of them), is the fact that the right takes some very strange positions on debt management and inflexible positions on taxation. Well, at least publicly they do.
Also, the strange Fox News/Talk Radio/Tea Party dynamic is a turn off for me. I just can't fathom associating myself with propaganda that is so blatantly illogical and dishonest. Not to say the left isn't bad, but man, the right really swings for the fences.
Agreed on Huntsman comments from earlier. I didn't get to know much about him, but he seemed like someone I'd be more interested in learning about. I can't say whether or not I would have voted for him, but I was intrigued.