The crux of it, though, isn't that he's unlikeable - it's that you don't like him. Which is fine. But you keep arguing as if it's not physically possible for anyone to like him.

Which is clearly not the case, as I - and from what I can tell, the majority of Who fans - do like the Twelfth Doctor quite a bit. In fact, I'd go so far as to say that, as of now, he's my favorite Doctor of the revived series.

That's not to say you have to like him. It's fine that you don't. But to say that he's not a likable character at all seems wildly inaccurate at best when so many people do like him.

And I think the change is perfectly justified - he confronted his mortality for a millennium on Trenzalore as the Eleventh Doctor, fighting an endless war, knowing that he could do nothing to end the war except die. So he accepted that. Then, he was suddenly granted a whole new lease on life - an entire new set of regenerations. How is that not going to mess him up psychologically? He was ready to die, accepted it, and then it turns out, whoops! Nope! You get to live!

So this whole season is about Twelve thinking he didn't deserve a new lease on life. That he should have died on Trenzalore after spending a thousand years doing nothing but killing. Sure, he did it to save the lives of others, but that's the thing - that turned him into an ends-justify-the-means person. That's why he seems to not care about death - he's seen so much death at this point that it's a numbers game to him. Sacrifice one to save fifty. Sacrifice fifty to save a thousand. Sacrifice a thousand to save a million. The needs of the many and all that.

But now he's starting to see Clara change into this (in Flatline), and that, in my opinion, will be the beginning of his "softening."

I say once more - you may not like him this season, but at least give him a chance next season. I'm betting he'll be more "likeable" for you once he's dealt with his inner "did I deserve a new life?" demons.