Probably going to be called a sexist, but I really don't want a female Doctor.
I know there's now precedent, what with Rassilon and the Master becoming "Missy," but as fun as the latter could be, I still found it offputting - just as offputting as I'd find it if, say, Romana regenerated into a male Time Lord. If anything, I feel it does disservice to "Missy's" character that she IS the same individual as the Master, rather than being her own character.
And before you say "but Hawki, you liked Ghostbusters 2016 and its all female cast," I don't consider that gender flipping, it's simply different characters taking on the same role, not altering the actual characters to take on new roles. But while the Doctor's personality has fluxuated between incarnations, his gender hasn't.
