A quote from Moff in this months DWM is doing the rounds at a few places. I saw it at Doctor Who TV.
“One of the horrors of regeneration is that a certain amount of his persona alters entirely. His appetites and his enthusiasms will change. And that’s sort of what I’m writing about now in Matt’s last episode, the fact that he’s terribly aware that he’s about to be rewritten. And it’s frightening.”
I really hope we don't get another one of those 'I don't want to go' regenerations. I found that really offputting.