This Year's Model of Humanity

I too find the Lonely God theme fascinating, for much the same reasons you indicate here. It's especially obvious to me from "Journey's End" that the sense of dichotomy between the man and the god and the tension it implies -- a tension that finally tears him in two, metaphorically speaking, leaving one of each in a sense -- was largely the point of his character arc over the course of the past four seasons (much as I may wish otherwise, since the opportunity for positive growth and change was there but remains largely unfulfilled in the Doctor with which we have been left).