This is pretty interesting to me.
As a M2F, all my life I identified as being attracted to girls. Honestly, I had never had a crush on a guy before. So, about 4 or 5 months on HRT, my wife and I were watching a show called Top Shots and we had been watching this show for 3 seasons so I was not expecting what happened. One night, my wife made a remark about how rugged the host, Colby Donaldson, was. I looked at him and Oh my gosh, something clicked on and all of a sudden I just wanted him. So my crush is definitely on Colby Donaldson.
I know there is debate on whether hormones release a person's sexual orientation or changes it. I am in the change camp because I experienced it first hand.