I have only had one dream, to this point, where I appeared as female.
I do not remember a lot about the dream itself other than it was in black and white and it seemed like I was living out an action adventure video game.  A lot of running around, jumping, dodging baddies.  Anyway, having survived whatever was going on, I walk into the bathroom and look at myself in the mirror and it's me in boy mode.  Than I bend down below the mirror to splash water on my face.  When I come back up to look in the mirror again and everything is now in color and I see myself, for the first time ever, as a girl.  Nothing outlandish, just a girl in a hoody with brownish hair pulled back in a disheveled ponytail.
Do you remember falling asleep in high school and all of a sudden you dream that you are falling and you wake up with a jump?  That is what it was like.  So, at 4:14am on July 4th I jump out of bed after seeing myself in this dream and the only words out of my mouth were "what the f... was that?"
Meaningful, maybe.  
Memorable, absolutely.