HRT not only changes you body, it changes your life. If your are a transitioning TS, 99.9% of the time its for the better. I'm not going to say when I transitioned it wasn't for the better because I (and my wife) enjoyed it for the first few years. But after 3 years, as I look back in hind-site, I could see the changes in our relationship is some "different" places, and not just the bedroom.
Hormones not only alter your body and tell it to grow breasts (if your lucky), but the changes it makes to other areas don't go away even you don't grow breasts. Besides the fat-cell re-dispersement, the last place most people consider it changing them is their mind. Hormones alter the brain mapping...which is why you cry at the movies, get 'bitchy' at the drop of a hat, or enjoy an erotic moment and never leave your seat. That "motherly instinct" doesn't come from karma. Even if you quit HRT, in my case after about 20 months but continued the t-blocker kidney meds for another year+, the 'side-effects' don't go away.
To be honest, they don't go away 30+ years later. As my "T" levels have begun to drop naturally due to age, the use of medical steroids and other similar drugs my breasts feel like they have been kicked into overdrive. My attitudes have softened greatly, but I find a good movie easy to cry at...again. Its like with the re-map of my brain oh so many years ago the pathway has been overgrown but a quick mow and sweep and the path is clear as it ever was...I feel almost as "girly" as I did way back when and this time I don't know if I'm enjoying it or not!