Well, I am convinced that, from the neck up, the biggest factor for passing is just hair (facial and hair proper), and this kind of proves my point. I only had some light make-up on, I hadn't made a huge effort in covering my beard shadow.
It's not entirely by accident, though. I don't try not to pass, I just don't do things for passing, I dress, do my hair, etc. in a way that feels good for me, for my own comfort and satisfaction, not for others or trying to look like a supermodel.
I know your photos aren't current, but your hair looks great in them!