I’m happy with the different ways of choosing genders that you’ve listed; I’ll use different methods on different playthroughs and enjoy it. (When I sit down and think about it, I’ve used all those methods when playing recently.) If it’s based on PC orientation, I don’t love “bisexual PC sets specific RO genders” and prefer “bisexual PC randomises RO genders” which I think is how Choice of the Deathless does it.
Here are some results from a similar poll that I ran on the Royal Affairs development thread last year which may be of interest! That discussion prompted me to add a “set genders individually at the start” option (before, I’d only had the option to choose individually when meeting them).