You go right head and hold your nose. I did so in 2008 because of Sarah Palin's presence on that ticket, but I'll never do it again.
To quote Churchill, "It has been said that democracy is the worst form of government except all the others that have been tried."
If I were given the power to put one candidate in office, that man would be Rick Santorm, but that's not how the system works. Your strategy appears to be to take the ball and go home when things aren't going you way. Again, that is your right. But if you see no difference between Obama and ANY of the Republican candidates, you are not only wrong, you are in direct disagreement with your hero Mark Levin. He consistently says as much on every program. So, again, if you fail to cast your vote for Obama's realistic competitor, you are essentially voting for Obama in order to make your idiotic point.
So are you planning on pulling that lever for Romney if the GOP manages to force him down Conservative throats as its nominee?