I think for me it is both. I'm currently on a low dose trial, and that has had a positive mental impact, but I still have a real desire to also socially transition. I'm kinda easy on doing it either way. If I start HRT first, get to male fail, but then go full time and find it's not what I want, then I'm stuck in the middle. Full time first, and I've got a longer period of awkwardness to work through, which I'd rather not have, but will if I have to, and I can go back more easily early on.