SpoilerThe thing is it gets back to the main problem I had with 10 as a Doctor, he was far, far too human. Time Lords don't fear their regenerations, they know they aren't dying, that it's still the same person. I was just watching "The Invasion of Time" and two Time Lords were casually discussing how they were getting old and it was about time for them to regenerate. There was no fear, no anger, just acceptance and a little bit of anticipation to have their body be less achy again.