1. A psychological or brain view of personal identity. In other words, either what makes me me is the psychological features of my inner self or my brain. Both views say the same thing about survival in brain transplant cases, so either view would do.
Do a brain transplant. Switch the brains of a man and a woman. If you did that to me, would I then be female?
Keep in mind -- I have the same brain, and that brain has my original male DNA. I also have a new body, one with the sex organs of a woman.