On Thanksgiving day 2006 I was on an Alaska Air flight from Seattle to Phoenix when I noticed that Steve Balmer (Microsoft CEO) and almost his entire family were on the plane me. And they were all in coach!
SteveB is the 15th richest American (http://www.forbes.com/lists/2006/54/biz_06rich400_The-400-Richest-Americans_Rank.html) with about 13.6 Billion dollars. Yet he was just like another average Joe on Nov 23 2006 when he was enjoying his bag of peanuts and little to no leg room for the ~2 hour flight to Phoenix.
It makes me happy to know that people like SteveB and his family (His parents sat directly in front of me) don't act like most billionaires. They were nice and polite to the flight attendants and others around them. If I did not know that he was the CEO of Microsoft I would have never guessed that he was a rich as he is.