This has to be the worst pair of candidates in my voting lifetime. I don't think either candidate is presidential material. Obama won't hesitate to expand government and pander to foreign leaders, both of which weaken the nation, and has not fulfilled promises he made that he COULD have fulfilled (transparent administration, e.g.). He let the bankers call the shots during the financial crisis. Romney cannot even acknowledge it might be OK to raise taxes on the very wealthy even just a little, although I am encouraged that he has a fiscal conservative as a running mate.
In cases like this, when both candidates are lacking, I think the best option is to replace the current guy. A change in administration disrupts things and it eliminates momentum that would lead to more of the same.
Obama has not earned another term, and that above all is the reason I will vote for his opponent. The more turnover, the more that elected officials respect the average citizen and will act more appropriately. The middle class is shrinking, is suffering, and yet they keep re-electing the same people over and over. There needs to be more turnover.
This should apply at every level. People who do not deserve re-election should not be re-elected even if the opponent is not particularly appealing.