That's such a good question to ask people.
Im a bit taller at 5'8, and started at 16st 5. I'm currently 12st 7.
When I was in my early 30's, Like you, I once went down to what was considered a healthy weight (11st 10), having lost 4.5 stone, but I just couldn't sustain it. We then went through some very stressful times and the weight steadily went back on again.
10 years later, in my early 40's, I lost 4 stone, but this time decided to stick at 12.11, which was at that point my happy weight. I went up and down over the years by about 7 lb, but pretty much stayed in the same weight zone and was very happy there
Then came Covid, moving house and another family health crisis and I put weight on, and on, and on.
So when I started MJ I decided to aim for my 'happy weight' of 12.11.
I am now 12.7, so a bit below that.
I keep lowering my target weight by a few pounds, but I really would like to get to a healthy BMI, which is 11.10, and I really believe that with MJ I can indeed get there. However if I decide to stop before then, that is fine as well.
I now know so much more about my body, nutrition that suits me, and have tried to address my psychological relationship with food. I will also have the support of MJ at a maintenance level. Personally, for me, I think it is worth having another try at achieving and maintaining a 'healthy' BMI.
I think if I had tried to aim for such a 'low' weight at the start of this I would have been disheartened, as it seemed like a very big mountain to climb.
Setting smaller targets along the way, achieving milestones like each half stone, and getting under stone levels has helped me to keep going.
I also measured myself at the start: calves, thighs, bum/hips, stomach, waist, under boobs, bust and upper arms. Each month I lost a cm or more. My waist is now 16cm smaller!
I have also made a list of the NSV's as I have gone along, so I can read through them and remind myself of my non-scale achievements as well.
Sorry, a very long post, but your question got me thinking.
Good luck on your journey.