I have been watching this thread while I was lurking. I have always assumed I passed and really didn't give it any thought. Stephaniec has been exploring this topic for some time, and has gotten me to re-think my assumptions about stealth and passing. I really appreciate her ability to have such a hard conversation and push these things out into the light.
I believe passing is mostly about our own expectations. If we think about everything we aren't, we can all find ways in which we will never pass. Society / culture will see us in the spectrum of female or male-ness. If we have the will, I think we can all find our perfect spot in that spectrum to 'fit in'. Perhaps gaining or losing a lot of weight is required, or stopping our extroverted tendencies and stop talking in public. Maybe we need to dress like an old frumpy battle-axe, or have a lot of surgeries. The list is long of things to try. Unfortunately, after all that, we probably still don't pass 100% of the time, or worse, being that woman or man may not be the pot of gold we hoped for when we began this journey.
So setting my expectations is how I pass. My first customer is myself. If I feel and act female as I understand it, I become what I want to be in my mind. If others don't see that at first, they usually seem to come around as I consistently portray myself in my chosen niche. Over time it becomes easier, and my friends drop their guards and trust me so that I can do the same with them.
I will say that in today's world, passing and stealth are very hard compared to the 'old days' when I started (1980's). In those days it seemed everyone had an aunt who had a deep voice and that was enough to set their minds on the right perception, but today we are out and proud and on the cover of Time, and not at all trying to be stealth. Today, people see that tall deep-voiced woman differently, and it can be harder to avoid discussions about gender with even casual acquaintances.
Stealth has so many definitions, I am stealth in that I have broken the tie between my new name and my old in every way possible and only my closest friends and family knew me as both. That doesn't mean others don't know I'm trans, just that they can't easily track down my history. I'm not sure that qualifies as stealth, but in combination with my passability, it provides me with a safe and rewarding space to exist.