Argh... topics like this drive me nuts, because for every man who exhibits a particular behavior, there's a woman who does the same. The only traits you can say are stereotypically "male" or "female" are those imposed by culture, with the exception of anything tied directly to physiology. Men don't typically cross their legs at the knee because it can hurt the goods (my male friends have told me this). They stand up to pee because it's more efficient that way, and their anatomy allows for it. However, I've known plenty of girls who do the same, whether it be due to dirty public restrooms or personal preference.
When I first went full-time, I had trans friends asking me how I was acting more masculine. My answer? If I had to try to act more masculine, wouldn't that say that perhaps I wasn't really a guy, after all? Gay men defy gender barriers all the time, as do effeminate straight men. I have no problem being myself, and the only thing I distinctly recall doing to pass better as a man was to make sure not to do those things I had done previously in order to show people that I was supposedly female.
SD