I agree that being tall isn't problematic. Yet, it makes sense for people to feel self conscience about it. As a taller women (5'11), I always fear that this will be a difficult aspect for me to deal with while attempting to pass. It's not that being tall makes you stand out, but it is one of the many features you feel could be detected. However, that fear is often all in our head and not even on anyone's radar. Most people don't see it as a problem nor do they start to think you are a male because of it. If you fear this, as I do, you need to learn how to conquer your internal irrational fears (which I am working on).