I'd like to leave enough for the kids that the death of me or my wife (whoever is last) is coupled with further financial stability for them and their children. Lucky for me, I have 4 children that are happily married and very successful in their careers, so our estate will only add to their own and hopefully continue to assist them in passing wealth down to their children and beyond.
So, financial success for me at this point is far lower than what I consider financial success for my family.