Knowing that I'm not crazy, or mentally disturbed, etc. and that I'm not alone feeling like this.
Being more myself, and even though I sometimes hate my life and body also feeling happier with it, as now I know what caused my earlier unhappiness, AND I know there's a way to fix it.
Also having a good 'insight' into both sexes. If I would have born a guy I would probably never have ended up so understanding and sensitive, which I figure women really like. Also do I know how horrible periods are, how difficult it sometimes is to be a woman and have a (better) understanding in how many women (seem?) to think. Though I have to admit I sometimes still don't get them, lol!
But the most valuable thing for me is accepting and discovering myself, and finally loving myself for who I am!