Oh, I'm always thinking, me. There's so much in the universe to think about - why wouldn't your brain keep sparking up in wonder about it all. If I ever don't want to think about this maddeningly beautiful universe, well there's something wrong.
'Course, part of me is still a bit worried. See the whole thing is a bit like something from my people's past. The Gems, I mean. There was this bloke, Rassilon, and he made something a lot like them. He was a genius, but... Not exactly the nicest person out there.