I've been steadily losing weight slowly since I started HRT 1 year 5 months ago. It's become extremely easy to lose or gain weight though, so I'm rarely completely static... it's always going slightly up or down between 3 or 4 lbs all the time.
Before HRT my weight was fairly stable and hard to knock off-kilter. Now I could drop a stone in a 12 days if I really wanted to, or probably gain it too, if I ate too enthusiastically.
The result is I tend to be apathetic about eating, to eat less than I should, to make sure I'm not gaining any weight. I used to have an eating disorder that helped me mentally with the idea of keeping the body as angular as possible, as terrible as that is, and at least that's largely gone now, since I know I'm not under or over weight and I don't have to worry about some of that any more. I don't know if eating disorders ever truly leave a person's mind though - the sheer repetition and obsessing over control doesn't seem to completely leave, because there's always that fear you'll balloon out if you let go and if that happens it only leads to more health complications in another direction.
So I'll always be trying to stay on the skinny side as opposed to the other side. I don't want to be a (garden) rake, but I'd rather deal with that than the effects of hypothyroidism, etc.
I needed to lose about 20 lbs really to be ideal, in my own view, and I'm pretty much at the goal with almost no effort. I got a general "feel" for how much I should eat per day that led to a weight loss of about 1lb per week and aimed for that as a general rule (without explicitly counting calories); if I ate "too much" one day, I'd eat less the next. It's worked out pretty well, while also trying to make sure I don't fall back into bad mental habits.
(It would have been a hell of a lot easier if I still smoked, lol)