To clarify (I think I get what you're saying), you were (at least somewhat) interested in women before beginning HRT, and then became interested in men once everything chemically realigned?
Not women so much as one particular woman. So interested, I fell head-over-heels in love with her at first sight. Engaged after a month, married a year later.
It's our 32nd anniversary on the 21st.
Now... a venture into TMI territory. Necessary to answer you completely though, alas.
One problem. Actually, two. I didn't realise just how far from the male norm my body was. There were certain physical issues. But just as big a problem was that I didn't get issued with a sexual orientation as such. No instincts. I can remember my father saying that all I had to do was relax, let instinct take over, my body would know what to do.
It didn't. I could control blood flow to certain places, but it took concentration - like learning to stop urinating in mid flow. Very hydraulic, controlling deliberately muscles that usually operate on autopilot.
Had my instincts been in place, or had my genitalia been more usual, perhaps intercourse would have been possible. When I went to a fertility clinic 4 years after marriage, they did say that physically it wasn't quite impossible. But I knew that.
Basically, I could please, but not be pleased. Anorgasmic. That had certain advantages, I couldn't believe that most guys were finished in less than 45 minutes.
No matter, We were, and are, in love. I looked male enough to be attractive to her. We're both intelligent people, and imaginative. It was always something of an intellectual exercise for me, if not for her. I was OK with it. I didn't actually understand sex.
After the change... it was an eye-opener. So much now
made sense. I gained an insight, emotional, visceral, into other people's feelings, something I'd only understood intellectually before. It really is instinctive, your body responds, you're just along for the ride.
If this were fiction, we'd both discover we were lesbian, or at least Bi. No such luck. There's zero chemistry. We're both unalterably, irretrievably straight. But we're both totally in love. We want to share our lives together, to grow old together. As a bonus, though it took syringes etc to extract gametes from mostly dysfunctional glands, we even made a child together, before the change hit and sterilised me in the first week.
This isn't typical, I'm Intersex rather than normally Trans. Such natural (partial, apparent etc etc) sex changes happen, but except for a few parts of the world, they're quite rare. The F to M ones are pretty well understood, the rarer M to F ones less so.
See
http://www.usrf.org/news/010308-guevedoces.html for an example. Or
http://edition.cnn.com/2009/WORLD/meast/12/17/gaza.gender.id/ .
We both tried boyfriends - but we both came to the conclusion that we were both already in love, and having sex with someone you weren't in love with, when there was someone else you were, while physically satisfying just didn't ring any bells. Too complicating too, and not fair on the guys.