Great thread - some really heartfelt things here.
Choosing to leave a professional career at which I was very successful but which I hated and made my life miserable with nothing to go to was definitely one brave point.
Probably my bravest moment was the point when I walked away from my relationship of 30+ years with emotionally abusive, massively cheating exH. He could never quite man up enough to say he wanted out of our marriage and family, it was always excuses and "you're the one for me really, I despise her, it's just sex".
After months of this I looked at him and realised with absolute clarity that the man I had loved was nothing but a figment of my imagination and that in order to be me I had to walk away and never look back. I walked and have never regretted it.