The first thing to know is the difference between sex and gender. While sex is a biological fact, gender is an identity; it is about how one perceives oneself. For a long time, I did not know about gender; this is not a widely known concept in mainstream France (recently, someone I know wrote a survey with a question about "gender". She told me her professors had said it was the politically correct word to use for questions about biological sex.). I knew about transsexual people, but I only knew about them as "people who feel they were born in the wrong body and need to change their biological sex". As to myself, my being a girl was just a fact, like my height or my birth date - a fact about me I had no control about, and which meant even less to me than my height or my birthdate do - and I could not imagine it mattering at all.

I eventually discovered the concept of gender, and came to understand it, but for a long time, I did not think much about my own gender. I knew I was not transgender or neutrois, and until recently I was not aware that there were other possible gender identities. More important, I was not aware that gender is something that does matter to most people. But lately I have been spending more time on the gender subforum on AVEN, and reading the threads there made me realize how much some people care about their gender identity - how important it is to them to be perceived as their real gender, and not as their biological sex. Some of the things I read there made me realize that it might be a good idea to explore my own gender identity. I am still working on it, as I have not had as much time as I wished to think about such matters lately, but so far I have understood that my biological sex means nothing to me. I do not feel male or wish to be male, but I do not feel particularly female either, even though my biological sex is female. In my head, I am neither male nor female - I cannot relate to either identity. But I wish I could adapt my gender expression to the circumstances - play a female part one day, and a male part another, and be just myself - and not be perceived as female by others, but as neither male nor female - most of the time. I doubt such a thing is possible, though, so as it does not distress me to be perceived as female, I have not yet tried to change anything (I do enjoy it when someone addresses me as though I were male, though, simply because it is not the obvious assumption). 

I cannot write much more on the topic yet, as I have only began to explore it myself. I hope to be able to gain a better understanding of my gender identity in the months to come, since I should now have the time to think about it. I will certainly keep you posted.