Ephemeral
Your question deserves a more thorough response but am rushing to work so will respond in points.
-  I was unable to accept that I was a complete fit with what a m or an f was supposed to be, feel or act
-  most differentiating criteria seemed to speak to performance and how I would occur to others ie how they would read my gender (and perhaps sexuality)
-  the performance involved in needing to 'fully pass' was a complete turnoff ...  But the increased flexibility was attractive.  The greater range available to F in our society was something I needed
-   More feminine aspects attracted me as it gave me access to a whole range of emotion and behaviours that, as a M, I felt uncomfortable pursuing
-  some physical aspects of F attract me ie hair free face, longer hair, better grooming - hair, nails etc but large breasts which gendered me as clearly F did not
-  there was a lot about my socialisation as a M which I would like to keep
-  as a student of leadership I do not accept that the categorisation of attributes as being F or M is appropriate, indeed I see all attributes as non gendered and potentially available to a highly functioning leader or person
-   The intense dysphoria that I had could not be successfully addressed by cross dressing and therapy, only by low dose hrt, and my life has been the richer for this
-   Empowerment and sense of self authoring that followed from my understanding that my gender was unique to me, that I didn't need to choose to be 100% M or F as there were other options.  Understanding, accepting and being Aisla has caused me to become more present, more connected and more conscious
-  accepting a non binary tag, owning a non binary rage fits where I am and who I am
-  I expect to continue to grow and to change and non binary allows me to do this
-  of course many non binaries still transition physically in a binary sense and I can understand for a genetic M that being F provides greater ability to express a non binary nature, probably more acceptable, less fraught, dangerous etc.  however I am intrigued with and am finding that the rigid alpha male that I had learned to be, can evolve, can change, can be more A,  and much closer to non binary than I had understood or wished
Hope this helps.  It certainly helps me review my logic, but there again I do over think and I think that this is less about logic and more about what feels right and what feels most authentic.
Safe travels
Aisla