My experience is that there are roughly equal numbers of what I consider trans men and trans women. Many of the surveys done apply criteria such as 'seeking or have received gender confirmation surgery' to their identification, which throws a real wrench into the works. FtM Gender Confirmation Surgery (GCS) is only sought by a small portion of the FtM community (one survey puts the number at 17%), at roughly half the rate that the MtF community seeks GCS. The FtM GCS is more complex, and produces what many consider to be a less satisfactory result than the MtF surgeries do.
I know quite a few trans men who are satisfied to just have top surgery, or even no surgeries, some hoping that GCS will significantly improve before they opt for it. Several of my FtM friends present as stone butch, completely accepted by various factions of the LGBTQ community.
Dating within queer spaces definitely happens between FtM and MtF folks.
I used to consider myself as a simple lesbian in orientation, but with transition and being more open to my identity, I have also questioned my orientation. I find that I am attracted to persons with a softer 'femme' appearance and personality without regard to what might be in their briefs. This range includes cis women, trans women, and some trans men. (There was a trans man at an LGBTQ meetup a year ago with a lush red beard and leg hair, and I kept wondering what it would feel like to be entangled with all of that. I still found a certain feminine energy about them that attracted me!)
But... but... What about the hardware between their legs??? There's more to romance than that! And if I do make a romantic connection sufficient to unlock my demisexual nature, I figure I can always use an adapter if needed...
It's a moot point for me, personally, as I am currently In A Relationship.
The topic fascinates me, though. Humans are so wonderfully complex.