Hmmm.

I'm a guy playing female char. Most ppl don't ask me if I am a guy or a girl though. Very few do, and I usually just reply something along the line of 'why does it matter' and so on.

For quite sometimes I played MMO with my friend who is a girl but played male character, and we usually played in duo. In party of guild raid when we use VoiP, ppl often mistook us one for another. They said we roleplayed very, very in-character, lol.