It's not that I can only do what makes me "feel good", but that I can't do anything I find morally indefensible and live with myself afterwards. It would make me feel good in a perverse, Schadenfreude kind of way to see Obama get elected and this country to experience the Communist Hell it deserves, but that doesn't mean I want it to happen...and I definitely don't want to cause it to happen.
I'm always telling people to live by their principles and vote their conscience. If I voted for Obamney after saying all of that, I would be the worst kind of hypocrite.