In a recent interview with Doug Polk he provided a bit of insight, he said that he takes his bad beats so hard because of the lack of volume that he is able to play. Many online players don't take beats so badly because they can play 1k hands an hour, but if you can only play 25 or you are in 1 of 7 tourneys you'll be able to play in a year it's much harder.
Phil is a stand-up guy, he is entertaining and while not humble about his abilities or accomplishments, he doesn't claim to be or act like he is a better person than anyone else.