Really, ghost life is a step up, as far as the Doctor's concerned. He wouldn't have minded his death if it hadn't been as drawn out as it was, but at least it's a thing of the past now. At least there's the knowledge that events don't last forever, so the end has to come around eventually.

But for now, he's content to just rub shoulders with his fellow ghosts whenever he encounters them.

"Right, I never thought I'd say it, but being a ghost is really not as bad as I thought it might be, at least when compared to the alternative." He nods in agreement with Kevin. "Not a bad life, all things considered."