Here's a little different twist on this.
The thought of leaving our money to my son is one of the great motivators of my life.
My wife and I live a very modest life and live well below our means. We started out from fairly humble beginnings, got the degrees, and have professional careers working for the public agencies. But we saved voraciously and I took an interest in the stock market and did well, on top of the saving.
Somehow things just grew and when i last checked we were in the top couple of percentile based on net worth. But again, living modestly.
No one would have the slightest idea, least of all, our son.
We don't need to work anymore, but still do, and expensive luxuries that we can now afford just leave me cold.
I regret that I won't see the look on his face when he finds out his inheritance. Mostly, because I hope it sends a strong message - a message too large to tackle here. Suffice it to say, once you have over an amount necessary to live, retire, and perhaps afford the education of your offspring, then it's no longer about the money.