If I am wearing feminine attire I prefer being addressed with feminine pronouns, but when I am dressed in male attire I expect that people will use masculine pronouns. I would not mind if someone referred to me as "she" when I am in male attire, but I would not expect it, and I take no offense to being referred to as "he". My gender is fluid, so I do not mind the pronouns being fluid as well.
In a somewhat related vein, there is a discussion on the TG Forum about "A Man in a Dress" and how John (or Jane) Q Public might address such a person. I know that I do not pass very well as a woman and am generally perceived as male no matter what my attire. Still, when a person is wearing a dress or a skirt (with the exception of a man in kilts), I think it is only polite to use feminine pronouns. When a person is wearing pants the situation is more flexible--if the individual is attempting (successfully or not) to appear male, masculine pronouns are appropriate, on the other hand if the individual is attempting to appear female, feminine pronouns are appropriate. For those of us who are trying to appear androgynous, it is probably best to avoid pronouns or any gender specific references.