(1) The main one is that I detest his class-warfare, "two Americas" theme. Who is he, supposedly the son of a mill worker and now a multi-multi-millionaire, to decry this country and the opportunities he found to advance himself? If he can do it, others can too.
(2) The second reason is that he is a trial lawyer who has made the bulk of his money in a shameful manner, with his ambulance-chasing lawsuits.
(3) The third is his refusal to quit the race many months ago when it was discovered that his wife's cancer has returned. I know he says that she insisted that he continue his quest but I feel that he was wrong to do so. If he and Elizabeth Edwards had no small children, it would be different. They and their doctors have no idea what the course of her disease will be. She will need the support of her husband in the coming months and years and so will their children. The rigors of the campaign trail and the demands of the presidency, should he have attained that position, would have severely limited his availability to be as helpful to his family as I feel he should be.
(4) Next, we have his liberalism. I wouldn't want him as President, just for that alone.
(5) Finally, I think he is smitten with himself and his boyish good looks. The famous video of him primping before an appearance makes that totally evident. We had an huge ego in the White House for eight years after the 1992 election and don't need that again.
Did I provide enough reasons? I think so. Now he can be kingmaker, throw his support to whichever candidate makes him the best offer. Attorney General, Vice President, Supreme Court Justice?
Saints preserve us!