that's a very interesting question.
I don't think I grieve my old self, as it was fading away by itself anyways, my female side was always there, giving advice, taking control when my old self wasn't strong enough to deal with life, then, when I started HRT my old self just "dissapeared" with my female side taking control.
But it's weird, when I see pictures of my past or remember things of old it seems to me like that's an entirely different person, I can't relate to that guy who went to the school, to all those friends that guy used to have, to all those experiences, it's as if I've been reborn and only my recent experiences are me, is it grieving or something else though? good food for thought indeed.