Interesting to see how long this thread has been running!
I'm a castrated male, on full female HRT via injected estradiol pellets. That all started due to recurrent prostate cancer, and it's being kept well controlled for 4 years now.
I'm not trying to be "female", to be clear. That's not possible nor desirable for me. Physically, I'm castrated, and now sport 38DD breasts due to the estradiol supplementation. I usually wear some kind of support, either a stretchy sport bra or undershirt with a built-in "shelf bra". Mostly, stabilizing and minimizing the appearance of my two primary results of being on full MtF HRT. Honestly, I kind of like them since they align better with my mental state.
Mentally, it has been fascinating. My mind has definitively shifted away from being a "man", into a eunuch space I guess. My presentation is mostly just a guy who happens to have some quite noticeable breasts. The "nonbinary" term seems to be applied mostly to people who exhibit presentation
On the other hand, I am NEITHER, at least mentally.
The typical "man" stuff, sex obsession, sports obsession, aggression, violence, and so on just turn me right off now. I find the manly bragging about sex, the interest in sex, rather amusing. I seem to remember being like that, but I have no idea why. Sex to me is as interesting as loading the dishwasher or mowing the lawn! Utterly no interest in it at all.
In fact, I've said many times, it feels like there was someone else living in my head back when I had testosterone. I don't like that guy in many ways. As a male presenting, physically feminized eunuch, I am in a delightful eunuch space between the sexes. Calm, peaceful, energetic, free of the ugly side effects common to surgical castration and the loss of testosterone. With estrogen, I just feel TERRIFIC!
My closest family and a very few friends know of my surgical castration to manage my prostate cancer, but... I haven't told anyone else the rest. It's only in forums like this where I feel I can be myself and embrace my eunuch status.