For me, 3 and a half weeks on female hormones estradiol valerate and micronized progesterone but no anti-androgens, I still feel strongly attracted to the breasts of genetic girls including my current genetic girlfriend.  She is 32B size, and now I want that size for myself, too!  For me it would be 38A or 38B, if I am able to get that growth.  Also now, I feel definitely stronger attraction to males but I haven't acted on that recently in the real world.  I had 4 or 5 occasions with a male at age 16, so that was a long time ago.  I basically hid my female side from age 20 to age 53.  For about the last 4 months since I started painting my toenails bright red nearly always, and sometimes with a little makeup even when in public as a male, I have more attraction to guys and it would definitely interest me to sexually satisfy a guy.  But, that would also depend on my current genetic girlfriend's feelings about that, because HER feelings are number one.
I already in just 3 and a half weeks have protruding nipples, and a small but definite mound develping between my nipples and my areolas.  I don't know if my breasts are truly bigger yet, but they appear to be rounder anyway.  Emotionally I feel so very calm, and I feel right.
I really appreciate much better I think, how genetic girls feel.