Good food for thought, but I think even cis-genders would have a mental meltdown trying to dig into that topic deeply.
For me, Transgender is a physical definition not a mental one. I am me... as long as I think like me I have a cis-mind. It's only when I put gender into the forefront of my every thought that I would have a trans-mind. I couldn't imagine how difficult life would be to question, if I think feminine enough to be a woman.