Many of us pass as women in public having made various changes to our bodies, dress, mannerisms, voice, etc. As I've progressed in my transition (now all the way through GRS), I've found myself becoming more and more at ease with who I am, and less and less concerned about passing in public. It started with my not bothering with makeup foundation on a daily basis (most days only a bit of lipstick and mascara suffice), trimming my fingernails to a function length and not using polish most of the time, and dressing in more gender neutral clothing for convenience (when was the last time I wore a pretty dress?). I've found that I still pass as a woman without doing the things I used to very much depend on to pass earlier in my transition. Still, if I go too far in this direction, I will get sir'd, or at least not ma'am'd. The straw that breaks the camel's back is either 1) not wearing a wig (my hair transplant has not grown out far enough yet) or 2) slipping into my male voice accidentally. If I avoid these 'mistakes', I'm consistently read as female. In fact, because most women these days are rather lax in their presentation, minimal makeup and simple dress (top, jeans, and flats) seem to enhance passability.
My question is how far can you relax your feminine presentation before you lose passing ability?