I can't speak for anyone else, but I think it makes sense to wait until after going full-time before applying for a name change. As long as I still need to pretend to be male for any purpose, I would like to avoid the risk of being 'outed' by my records. It is just a document, anyway. I face many obstacles along my path toward a feminine future, and an "M" on my documents is a rather small one. My dysphoria comes from my body, anyway, not from others' perspectives or from a piece of paper. My feelings do get hurt easily, but I bounce back quickly. With that said, I can totally understand how seeing the wrong name on documents would be a set-back to someone who is already full-time, how that too can "out" you or cause dysphoria. As such, I think it makes sense to apply for a name change whenever the benefits exceed the risks, which for me will be shortly after going full-time.