I would hardly be surprised if Time Lord genders and sexualities and romantic orientations changed between generations. I’ve always personally though the Doctor is on the Asexual spectrum, but that has probably shifted as he move through his lives. Now it’s fairly clear in the EU that the Eighth Doctor for instance is almost definitely non-binary, and very likely panromantic and possibly pansexual, though I personally still think he’s on the asexual spectrum even in that incarnation. And there’s also some questioning regarding the Seventh Doctor’s gender. I think it’s ridiculous for fans to argue that the Doctor MUST be one way or another because of some specific incident or other, because none of the writers have ever really agreed on anything, and tend to contradict each other a lot. All we can agree for sure on, i think, is the that Doctor clearly doesn’t conform to standard human gender or sexual categories, and I wouldn’t be surprised if other time lords were just as fluid.