I was thinking of the Myers-Briggs typology in my initial statement. I am an INTJ as well. I seem to remember reading on this board some time ago that the ER group is disproportionately INTJ types, and it seems that that personality-type outlook fundamentally helps put someone into a FIRE frame of mind.
But there is something more to it as well, which I haven't quite figured out. For example, the nature of my w*rk pulls for INTJs, so we have a disproportionate number of this type in my office. But, of approx 100 staff I can think of only 1 other who is considering ER (at 57; never had kid expenses). What I don't see is the excessive spending and debt that others on the board report. Instead, I see basic saving (5-8% deferred comp), and then living at your means. Don't know what it means, but an observation.
