Re: What exactly is Regeneration like to the Doctor?
I for one like the Doctor 10 philosophy, and perhaps it is only in those final moments that he can see the truth of it. He popped up and felt great but it isn't like 9 was there to argue the point. Its like asking Tom Riker if he misses being William Riker and then asking him if he would be willing to split again and let the new schism version of him go on living his life.
"There is no reason why good cannot triumph as often as evil. The triumph of anything is a matter of organization. If there are such things as angels, I hope that they are organized along the lines of the Maffia." - Winston Niles Rumfoord.