I can't honestly say I care even remotely about the "gender options" of the character creator, past the basics. Make me able to create both male of female characters and I'll have basically all I need in that area. But the more flexibility and options will be added to the actual character customization (look, physical build, voice, etc) the better.
For how I see it, the ultimate "litmus test" of a competent and flexible character creator would be the ability to pick a bunch of random popular characters from fiction/pop culture and being SOMEWHAT able to reproduce their equivalent in your game. Can I make expies of an Aragorn, Bruce Lee or Hulk Hogan? Can I have a big corpulent guy that looks like Kingpin from the Marvel universe? Etc, etc. *
it's not exactly my main concern about the game, but I would definitely welcome more options and flexibility than what was offered in BG3.
*NOTE: To be clear, I picked these examples absolutely at random as they were the first thing that passed through my mind and I don't hold any of them as a "must have" in the game. If you are going to comment something about not liking one of them let me tell you in advance that I simply don't care. If you are thinking they don't sound particularly tangent to the Divinity lore, that would be precisely the point.
Give me dadbods and butchqueens or give me death!
Well, I agree with you, not really the end of my life. But it would be nice...please