It will most likely be Mitt Romney or Herman Cain vs. President Obama. Let's see what America chooses.
Imagine President Ron Paul. Axe and slash defence spending (maintained or often increased using patriotic nonsense and bafflegab). Libertarian policies. Free trade. Opposes the Patriot Act. Anti-capital punishment. Anti-bureaucracy. I disagree on his pro-life stance but so be it. If he had Romney's model good looks, more people would listen to him.