If you don't like the idea of the changing his gender or color, you can go home now because my Mom has spoken and she's all for it. Granted, she's not a fan, and thinks of it as a charming eccentricity that all her daughters and daughter-in-laws have.* But sometimes an outsider has a clearer view.
Last night I had dinner with the family, and I talked some about your lovely replies. It came up that Matt Smith was leaving and she said, "Oh well, he was good. But this means you'll get a new guy soon and that's very nice."
I mentioned that there are rumors that the next Doctor might be played by a black actor.
She looked at me and said, "Are you saying that hasn't happened before?"
"Nope. It's all been white guys. Though the new series has way more races than the older series. Oh. And the Doctor has accents other than RP now."
"Humph," she says. "I thought that was one of the best things about the whole concept. They could cast whoever they wanted for the part, and not just someone who looks like the last guy."
"Well, some people think it would be unbelievable."
"Why? It's a show where an alien travels through time and space in a box. When he dies, he can change heigh, weight, hair and eye color, and age (she knows Matt Smith was the youngest Doctor cast), so how is changing skin pigmentation unbelievable?
"He could even change gender. How hard is it to change genitalia and secondary sexual characteristics? Now that would be an interesting show. The Doctor would have to deal with the changes. He's used to just breezing into places and solving problems, and people useally listening to him. Now with this new body, people are going to trust her judgement less, and it would make everything much harder. Also figuring out an outfit would be hard when you've been one gender for so long . . ."
Mom has spoken. So let it be done.
*She worries though about us being comic book fans. Apparently, that's just not normal.