Unlike most rich people, he does not make his family (children) feel any different than the commoners. Most rich people would spend spend spend.
However, my respect is only pertain to general knowledge. Similar to Socrates' an unexamined life is not worth living. Because I hold to one principle about money among disciplined persons:
Those who don't care about money, will make lots of it; Those who care about money, will lose either much money or moral.
Buffett obviously cares about money. So am I saying Buffett is immoral then? Only in the ultimate sense. For the ultimate moral code is belief in the Gospel.
Those who belief in the Gospel, would not need to defend how important money is. Hence, a lot of rich Christians would fail here.
People like Job, are good but rare examples. It is not easy. To not care about money and yet make lots of it. But this principle resonates with every verses in the Bible.