My head hair did not get thicker on HRT, actually got thinner BUT grew faster. Down to my butt now. 🙂 Progesterone seems to have helped hair become softer and shinier. My hair was already quite long before HRT, I didn't cut it. I see no reason to do that.
As for body hair, I did electrolysis (thermolysis) in the the chest and abdominal area, getting rid of that 'trail' for good. Very happy. It didn't take that long. Treatment there started 2 yrs after starting HRT when I realized that Androcur + estrogen alone did not make any significant difference.
Face, I started with laser before starting HRT. Then, after 6 sessions, I switched to electrolysis. Took about 3-4 yrs. Gone for good since. If you treat an area with laser only, there is always a chance hair will grow back, sometimes just as thick. Almost 6-7 yrs after my electrolysis treatment, no regrowth. Skin is smooth, no scars whatsoever and hair-free!

That's my story. 😉