By all means, consider him, or not, based on what he has done in the Senate. Nobody yet has put up any figures, votes, or specifics about why they won't support him, just generalities and vague comments.
I did not imply "Vote for McCain JUST BECAUSE he was a POW". My point was that before you casually throw out a locker room insult like "SOB", take a full look at the whole measure of the man.
Strong opinions are fine, and absolutely your right, but they should be able to be supported by research, voting record, and other information - not just because somebody Googled and found a picture of him sitting next to Hillary.
If nothing else, just say "I don't like the guy and I'm not gonna vote for him...don't know why, don't know that much about him, just a gut feeling".