I posted this question before, but the answers-that we take turns leading, keep the same roles, or switch leading roles according to dance, didn't quite solve the problem, since my ex and I both came out as transgender nonbinary since our divorce in 2010, thus somewhat switching gender roles.
My ex just asked me this question again. He/she seems confident we'll get back together and return to our ballroom/jitterbug dancing ways, but doesn't know how it will work, role-wise.
For us, in the unlikely event we actually get back together (as I've mentioned before, my ex was treacherous in the past), it is a bit tricky. Since we were married, not only has my ex come out as nonbinary female, but I also realized I'm a nonbinary partial transmale, and I now live androgynously.
He/she is still living as a male, but has started seeing a gender counselor at the VA, preparing for transition, but says he/she wants to wear female clothing, although identifying as "other."
When my ex and I used to dance, since he/she is 6' 1" and incredibly strong, and I'm a petite 5'3" female-bodied person, he/she was the one who did lifts, had a great lead, etc. and I was the one who wore ballroom gowns I'd designed and made, with skirts that flared whenever I whirled around or did spins. However, now my ex wants to wear gowns as well.
In a separate question, I also asked how two people dressed in skirts can whirl together on the dance floor, and several people on this forum assured me it is possible.
I still don't know how I'd dress while dancing, or what role I'd want IF we were to get back together, so I'm trying to gather information on how other couples have solved this problem.
But it's a long shot because:
1. Couples where both have recently come out as transgender, are rare.
2. couples who go ballroom dancing together are rare (especially at our age..64 yrs old).
3. People who are nonbinary are more rare on this forum.
I'm ok with wearing female clothes sometimes, depending on the situation, but usualy default to androgynous clothing. Not sure what role I'd assume as dancing pair. I only know the woman's role, but I could learn to do the male side.
But, even so, with me being a tiny, petite female shape, it seems like my ability to lead would be limited.