dorri,
During the period when my hormones were turning off and on like a light switch, I noticed that my normally oily skin turned dry when my hormones were "off". Then the hormones would switch back on again, and my skin would be oily again. I have been on low dosage hrt for quite a few years now, and my skin is less oily than it was, but not dry, except in the winter.
The lack of plumpness that you refer to is, I believe, a lack of colagen under the skin. This is what makes us look like we're not 20 years old anymore, regardless of how wrinkle-free our skin may be. Not that my skin is wrinkle free, mind you.

But the plumpness is one of the main differences between young skin and uh, not-so-young skin.
My hair has always been thick -- that is, each hair is thick
and I have a lot of it. What I am noticing is that it isn't so oily any more -- or probably it's that my scalp isn't so oily any more. I need more conditioner now. As for losing hair, I'm really only noticing that my pubic hair is pretty sparse now.

Maybe if I weren't on hormones, I might notice hair thinning on the top of my head.
--Rheanna