Re: What exactly is Regeneration like to the Doctor?
I don't think they're getting more violent over time. The Regenerations of River and The Master were both pretty similar to the ones of 9-10 and 10-11. The only difference with 10-11 was that because he'd been holding it in to long it was extra violent when it happened and the poor console room boar the brunt of it. I think it also had something to do with the radiation he had absorbed being released.
I'm being extremely clever up here and there's no one to stand around looking impressed, what's the point in having you all? - The Doctor, interrupting a very important conversation.