I picked up Barbarians at the Gate the other year, but put it down when I realized all it was doing was making me fantasize about all the useless toys I could buy myself if I was really rich. A good book to read if you want to dream about being an avaricious plutocrat.
Personally I'd like to see more rich people follow the Bill Gates model of giving almost all of it away.
Interesting, I can't recall any specific expensive toy except that the RKR guy's wife liked expensive interior design, and my main takeaway from it was "accountants can make unimaginable amounts of money, both by creating value and destroying it, pay attention to the accounting perspective".
Personally I'd like to see more rich people follow the Bill Gates model of giving almost all of it away.