When I was younger, I almost never saw myself in my dreams. Like i had no self image. When I did, it was usually non-descript, like seeing a shadow. Very rarely was I male.
As I reached my late 20's I stopped having dreams, or at least that I can remember. Then a few months ago I finally had one that I remembered and I was male, and it was a nightmare, I woke up thinking I will die as a male if I don't do something. Cliche', yes, but it got me started on therapy.
After that, I again went dreamless until a few nights ago. In them I was just getting to where I was beyond androgynous looking and started to dress and go out more. Basically it was me revealing myself to people, and it wasn't as bad as I expected (and yes I know reality can be very different).
I think dreams are many things, but I think they always serve a purpose if only to keep the mind occupied and active. Some may be to teach you how to deal with a bad circumstance or overcome a problem you have by allowing you to explore the possibilities as a result of your possible actions. Some may be warnings, others just food for thought or a way to explore your mind. My latest I think are preparing me for that day when I journey out and have to present to people I know and work with for the first time. Interestingly though, I am also starting to see myself in them, which like I said was something I never really had before. Like I am coming into focus.