I was one of the people who started T and found it 1000 x better than any anti-depressant or mood stabilizer I have ever been on. Not that I care for that kind of medication since it didn't work on me at all and was a money sink. But T definitely did help and I was extremely skeptical about it both helping me mentally and masculinizing me physically, since it can't be denied that I've always had quite a feminine face, hands, etc.
In short, was surprised at how good T actually has been for me in the anxiety and depression department. I am not anxious or depressed any more at all. Just impatient.
The other thing that surprises me is how little people actually care about the fact I am trans. I rarely mention it and don't wave it like a badge or label or prefix in front of people and they treat me exactly as they did before. In fact people have been amazingly open and accepting, all things considered. Even the people who disagree ideologically with the need for surgical transition generally do not get up in my face with any of that.