I believe that we make way too much of this notion that the perfect model of womanhood is to utterly blend in. Nobody is perfectly average, and everybody is unique. I don't think trying to run from our uniqueness - or even to regard it as a liability - is really what this is all about. From the very beginning, I have made authenticity to what I feel inside as the primary objective of my journey, and if that conflicts with blending in, it will be will the later that will be sacrificed.
For example, I am 6'3 1/2". My height is one thing that will never change, but I am not ashamed of it in the least. Of course, I could do a thing or two in my fashion choices that would down play it. Such as not wearing heels, or wearing longer and fuller dresses. But that would only have the effect of trying to temporarily camouflage a little what would be perfectly obvious when somebody focuses on me. So rather, I have decided to go the other way, and say in a very open way "this is who I am" and just own that as much as I can. I have pretty much followed that with everything that I have done in my transition.