Gov. Romney merely appears the most reasonable and pragmatic of the GOP candidates. His business credentials are strong and isn't that the principal problem the country faces right now? Near as I can tell none of those other guys know diddly-poop about how business really works and how to turn failing institutions around.
Throughout history those able to choose picked leaders who fit the circumstances of the times. To do otherwise, to choose a candidate based on ideology, is self-defeating. As a secondary criteria I would like a social liberal but first we need a fiscal and constitutional conservative. We need to restore faith in our financial and regulatory institutions.
As for the other stuff; if you don't like gay marriage then don't do it; if you don't like abortions, don't have one; if you don't like cigarettes, don't smoke them; if you don't like porn, don't watch it. Mostly, if you don't want your rights taken away, don't take away those of others.
Thus Endeth the Rant,