The only big change I've found is the complete inability to get angry. I can get irritable, but not truly angry. Its wonderful. When I stopped hrt a few times, I found I could get really angry, even more than before, like there's some kind of bounce back up to a higher level. Not that I have a problem with anger, just that it was noticeable.
For the rest I'm much calmer, and quite steady. Its possible that because I started low dose there wasn't too much change in the early years, and I have forgotten what it was like before. Also my life is really boring, so not much scope for getting excited.
I'm a bit puzzled when I read about other peoples big emotional swings, since I don't get those. I guess its either personal makeup and/or swings in E levels (which I assume I don't have due to using implant). I'm quite excited by the prospect of increasing my levels.