Breja: It's a change to an established character I don't like and I don't think makes sense.
SirPrimalform: Except in this case we're talking about a fictional alien who changes
all the time. When everything else about them changes every few years, why have you decided that masculinity is a defining trait of the character? If it's because all the actors so far have been white men, does that mean you'll also freak out if the Doctor isn't white at some point in the future?
Well, at this point I won't care about any further changes anyway. But no, I wouldn't care in the same way, as I don't think skin color has the same impact on personality. It would still feel like forced political correctness, and it always feels a bit silly to me when alien races turn out to have the same ethnicities as humans (black Vulcans for example, though I liked Tuvok a lot as a character), and I guess it would depend on the actor they chose if I'd "buy" him as the Doctor.
Yes, in a way I do believe that "masculinity" is one of his defining traits, and yes, becasue it's one of the things that have remained consistant. I think it rather makes sense that it would be the things that remain consistant that become defining. Like I said already, I think some things have to remain consistant, or we'll end up with a completely different character who only shares the same name and using the "he regenerates, we can do whatever" excuse is not something I consider good writing. I'm not sure how to explain it better than I already did. In a way I already gave it a shot with Missy and I never really bought her as the Master. It never really clicked for me that it's the same character.
I don't know why you're calling it a "freak out". I think I've made my case pretty reasonably and calmly. People seem to have the need to imply fear or hate guide everyone who dislikes this (or similiar) decisions, but it's nothing like that.