Pre-transition, back when I was a dood, I was 100% attracted to women. I never really got with any but I was definitely attracted to em. I never had any attraction to guys back then; the thought of me being with one was as one was totally gross and icky...I just didn't look at guys like that, wasn't even an option.
In all fairness, I was pretty uptight and close minded back then too. I was very distant and walled off to everyone. Being seen as normal, being liked and respected, being seen by everyone in a positive light I guess, and avoiding shame and embarrassing things; those were the most important things to me.
I've definitely changed a lot since then. I have been able to drop much of that baggage I used to carry.
If I had to label my sexuality atm, I'd say I'm bi (not really sure what I am honestly, lol, its complicated..), so it's definitely changed quite a bit for me. I do notice guys more, caught myself thinking that some are even cute, had first kinda boy crush too recently, so ya, definitely different. Yet, still think women are beautiful too so who knows.
I would say hrt def played some role in the change, how much so I can't really say. Also dunno if it was more, "I got the girl juice in my vains, oh hey, look at that hunk, hey baby" type thing, or more indirectly by making me feel better bout myself, thus more open and comfortable with myself, or some combination of that or what.