If anyone had told me a couple of years ago that anxiety, fear or being unsure of my thinking was a core motivation, I would have said they were nuts. It's why I had never even considered 6. I think we go through life somewhat oblivious of these things unless somehow they are brought to our attention. Think of a 9 for example.
As I think about it further, a great deal of my life has been focused on building these layers of security - financial, relational or otherwise. Even personality type is interesting to me because it helps to provide a bit more certainty about things.
Also, I am in the Information Security field. How about that.