I always "pass" when no one is looking.
For the majority of the time most people are just getting on with their lives and don't look.
I spend 24/7 en femme. I don't know the difference between "passing" and people not reacting.
I am sure many people I interact with realise I am "different". However who knows what is going on in their minds?
Forgive the labels, but I have been told that quite a few people believe I am pre or post op TS so relate to me as a woman.
Brighton is quite cosmopolitan and someone like me is not VERY unusual.
Elsewhere, I feel I am treated as I present - I just don't know or care what they are thinking.
Occasionally I have been "congratulated" for being brave - I guess I didn't "pass" on those occasions.
My SO is a great coach. If I slip up, she reminds me "walk from the hips"; "break a piece off the sandwich, dont take a bite"; "try not to stand so solidly" (I know what she means); "don't pick your nose at the traffic lights" (our little joke), and finally "you need a shave sweetheart!"
A coach (or wing gal) is worth so much!