The time when a crossdresser "passes" 100% is the moment when no one realises that that person is a crossdresser.
When out and about, being referred to by others using a female pronoun towards ourselves is regarded to be a validation that we've either been accepted as a female, or judged as a female. And it's a nice situation to experience. The person who elicits such a comment either genuinely believes we are female, or is considerate enough to refer to us as such.
But the truth is that we're not female. And when it's the case that a crossdresser does pass and fool everyone around them in doing so, they no longer represent the "crossdressing community", for in regards of other people, they are not regarded as crossdressers because they have "fooled" those people into thinking that they are a woman.
So it's only the one's who don't pass, the one's who don't attempt to hide the fact that they are a man, while having the confidence to dress in clothes more suited to women, that are surely deserving of more respect. It's those that don't pass that make others aware of cd's, and it's how those who don't pass interact while out in public that are the one's who are able to address and counter the public's perception/understanding of what cd's are actually all about.
When I was younger, I had a build and a face that made it easy for me to pass. Now that I'm older, my build is slightly bigger, my face slightly more rugged. And it's only through time that I've been able to become more comfortable in my dressing, so much so that I no longer deem it necessary, or relevant, to pass as a woman while out in public. So what gets me through the day is my confidence. Confidence in wearing what I want, and wearing (owning) what it is I do wear. I like/prefer clothing that is regarded to be feminine. I justify that be saying that it's merely my own style - my choice in clothing.
So how do you justify it? Do you try to pass? Do you try to present yourself as a woman? Do you wish you were a woman? Or are you just happy, like I am, being yourself?