Rational or Irrational

Each December the New York Times publishes a list of the top ten books of the year. The list came out in today's paper and I had not only not read any of them, but had not heard of any. A couple caught my eye, but the one that has me thinking for the last few hours is called, Thinking Fast and Slow. Here is the blurb that describes the book:

We overestimate the importance of whatever it is we're thinking about. We misremember the past and misjudge what will make us happy....[the author] demonstrates that irrationality is in our bones, and we are not necessarily the worse for it.

There is something, of course, ironic about me thinking about this for the last two hours. But here are some of my musings--however irrational. Is it possible that what I am sure about represents a composite of misjudgements? If irrationality is in our "bones", and we are not necessarily the worse for it, does this means that rationality--valid logical thinking--has insidious effects?

I spend a good deal of time in my head. If I "misremember the past" and "misjudge what will make me happy" then it becomes very difficult to plan.