In my own life, I'm pretty sure I was a 4w5 in high school and college. I THINK I was...it sounds like the most embarrassing things I've done with my life, anyway.
Yet, I've lived through several extremely harrowing years revolving around surviving with a severe chronic illness in a third world country with no family or friends around me, yet having to fight for existence every day of my life. I've been beaten and robbed, I've been infected with rare diseases, I've had important people in my life reject me, I've been mocked by the medical institution, and I would not wish my circumstances upon my worst enemy.
From this, I've become extremely rage-filled, confrontational, bitter, aggressive, cynical, and just unable to care. I've come to see life as a daily battle for survival and anyone who gets underfoot will simply be demolished; I have become incapable of feeling self-pity, or much of anything for that matter. I realized some time ago I was reciting everything in low-average 8 descriptions to myself without even realizing it (I knew about the enneagram prior).
It's been enough that, the more I learn about the enneagram, the more I wonder if I'm not an 8w9 and I just never noticed? I was so clearly a 4w5 before, which is why I continue to type this way...but I've so radically changed over the last 4 years or so that it's like the "old me" doesn't exist.
So, I'm not questioning changing fixes, but I sometimes wonder how these changes happen.