I don't think anyone really wants to be a transsexual. My therapist convinced me to at least try estrogen to see if it helped. Part of me hoped she was wrong and I that I wouldn't actually have to go through all of this. Of course she was right on the money and estrogen was the magic bullet for me. I also wondered if the physical changes would be good or bad for me, but I loved everything it did 100%.
You don't really know until you try. If HRT doesn't improve your mood or even makes it worse, then you know it's not for you.