I've been on Cyproterone Acetate and low dose Estrogen for three months.  So far, the only mental effect is my concentration and patience has improved a little.  I've read many times of people becoming more emotional once they're on HRT, and also getting a sense of calm or inner peace.  I've not felt either.

Is this because my Estrogen dose is low?  Will I feel the effect when my dose is increased in future?  My last blood test said my Estrogen levels are still below female levels.  Or do most people feel an effect soon after they start?

I would say that for me it was more of a change in how easy it my feelings surfaced as physical emotional responses.  The feeling were already there...  you just seem to find them and your body wants to react to them with a vengance.  I found that it happens far less after I figured out how I'd react to things...  it's a mental adjustment to maintain the composure that you're used to.  The calm and happy I'm sure are just natural responses to knowing that you are on the right path for you.

Female levels of estradiol range anywhere from 20 pg/ml to 650 pg/ml during a menstrual cycle, up to 75,000 during pregnancy.

everyone is different, some get it immediately and some experience way later like me. the emotional feelings hit me around half a year on HRT.

I've always been emotional and cry at the thought of having a bad game, a bad at bat, someone making fun of me, someone not willing to discuss things, and would rather insert egos. My reaction after 18 days is an uncommon calmness has overcome me. Instead of flying off the handle for the slightest of reasons a take more time to think about things. My ego is mostly concealed and I suddenly want to talk things out.It's awesome. I just wish now for a female voice.

Hormones and emotions, I believe that books have been written on the topic, and way too many jokes! I just began my third month on beginning levels of Estradiol and mid range levels of Spriro and have yet to get blood test data back. My first month was very intense and exciting, starting to actively pursue the changes that I has wanted for so long, but little of what I could call "emotional meltdowns". Month two signaled a big change in that regard. I have never cried so much in all of my life, over significant things and also over things of no significance at all (and quite embarrassing at times). I will go a week with no tears and then pour out a few thousand of them for the next week. And I wouldn't give them up for anything! - Anne