55 for me. My birthday falls close to the end of the financial year, so it works out nice and tidy from that aspect.
My initial plan was to take a career break for a year at 55, doing no work for the first six months and maybe some odds and ends of casual/seasonal work for fun but nothing related to my usual occupation in the second six months. I've never had time off work apart from 13 weeks of maternity leave when I had each of my children (and even then, I didn't stay away from work completely) and 18 weeks off with occupational burnout in 2015, and you only get one shot at living so I wanted some time to call my own while I'm reasonably young and healthy. But I want to have the option of being able to afford not to go back