This is really fascinating. Since I know a lot of you don't click links, here is a recap. The dying regret:
Working so hard at jobs, living as someone else expected them to be instead of as themselves, not expressing their feelings, not staying in touch with friends, and not allowing themselves to be happier.
In other words, they regret buying into those goals we learn as teenagers and invest our lives in as 20-somethings: conforming socially (being socially "in", or not being seen as "weird") and being rich (which makes us work too much and not connect with people as a result)
What a shame.
Good thing we have time to do it the way God recommends, where families and friends and using our talents are important, where the purpose of existence is Joy, and where work is to enrich our lives and provide for our needs, not to be all-consuming or make us rich. In fact, those things are the focus of commandments from God. Obviously, he knows what it's all about.