IANAP (I Am Not A Psychologist) but one thing I noticed talking to several girls at the last DLV was that they had some sort of transgender-themed dream as a child prior to any physical embodiment or crossdressing. Now this was a very small sample so I can't generalize too much given the diversity of people at DLV, but I was curious how much this applies to everyone else out there and if so what were your dreams? This seems like a really fascinating window into our early subconscious that I've never seen explored.
In my case, I remember have vivid dreams where I could change size and gender at will when I was about 6. Combined with the ability to fly this opened up the possibility for all sorts of dream adventures and mischief.