Some things from me:

• Early on, darkening of the perineal raphe was quite a surprise (aka the “sack stripe”). It’s not something I’ve seen mentioned in most HRT guides.
• How incredibly unreliable my own perception of how feminine I look is. People were treating me as a woman well before I could see even hints of it in my face.
• It’s nice that women will sit next to me on the train now. As the carriage fills up I quite often find myself in the center of a cluster of women, which is very affirming.
• Makeup areas in bathrooms. I had no idea this was a thing, and they’re great!