For those of us who identify with a gender other than that assigned at birth, we aren't really cross-dressing when we dress as the gender we identify with. We are getting our gender presentation lined up to match our gender identity, which can be a tremendous relief. With this we get out from under the constant stress of pretending to be a person of our assigned at birth gender.
Some have noticed that I refer to my presenting as male as cross-dressing, even though i was assigned male at birth. I identify as a woman, and dressing in slacks and a work shirt is cross-dressing for me. I'm much more comfortable in a skirt and blouse, or my skinny jeans and turtleneck than I ever was in a male costume. That comfort, and the drop in stress allows me to communicate better with others, be more relaxed, and generally function as a better human being.
Just another perspective on how this activity affects us...