For those that are not happy with their passing percentage, just keep trying, keep putting yourself out there and always display an attitude of self assurance and confidence.
There are lots of little things that will help a person pass, not just looks and not just voice. I mentioned this in another thread... go people watching in a mall, an airport, a restaurant, etc and watch the men and women and how they move, how they sit, how they eat their meal, etc, etc. You will see differences that you can apply to you advantage.
Fortunately for me, after 3 years of HRT I have been now been living full time for 16 months and pass 100%... lucky for me as my old male self I was never very masculine looking and with my slight build and with my not very manly voice, transitioning came comparatively easy for me for which I am very thankful.
As soon as I became full time I quit my middle manager job and I relocated to another town, a very small town, started my own business, and as far as I know, after 16 months no one in town knows of my male past. I have several groups of friends, men and women.... and I am in a small group of women, perhaps 5 or 6, we go to the local gym frequently... and so far I have passed the locker room "test". Things couldn't be better!