I think what happens is when we become the 'experts' of our domains, we tend to get bored of our profession. After graduating with computer science along with my friends, we really were excited about technology. But after many years, I saw most of my friends get bored with the field, only to see it as a way of paying bills.

I think a part of the problem is working in an interesting domain. For example, a friend who works in a financial domain never really sees the big picture, but works on a quality of service algorithm to speed up a trade.

Perhaps getting bored is a calling to see what we really love in life.