How much does your sex/gender, national origin or race factor into your sense of identity? If you hypothetically woke up in a different body that is not in your current state, how much would it effect your self-perception and identity? Would your values drastically change? I suppose you could include class or socioeconomic status, but that would probably have the most profound effect on one's lifestyle.
I believe I've always identified myself more by my interests and aspirations than anything out of my control. If my gender or national origin was different, it may have a positive impact on my life (due to cultural values clashing with my personality). I think being a different race would have the biggest effect in a negative way, as a result of prejudices and the stigma attached to belonging to a minority. I've never had a strong desire to adopt a group identity. Even when participating in activities that I enjoy with people of similar interests, I have a certain aversion to assimilating into a defined association.
When I see people who fervently identify with their sex, race, or national origin, I get the feeling they are lacking in any real, deep sense of personal identity; especially when they subtly or blatantly indicate how much better their sex, race or country is.