"This is the kind of melancholy that resonates throughout Doctor Who: A sense that the Doctor’s happiness will lead him once again to loneliness. "
"The Doctor never gets to live a normal life, which is his tragedy (…) But I also wonder if that’s why, the longer you watch Doctor Who, you find yourself relating less to the everypeople Companions and more to the Doctor. From our perspective, the world might change, but we always stay the same–as friends come and go, as we move from one place to another. It takes someone else to notice when we become a new person. Maybe that’s why the Doctor always seeks out new Companions: So that the man who never changes can change, over and over again."
Times change, and so must I… we all change. When you think about it, we are all different people, all through our lives. And that’s okay, that’s good! You’ve gotta keep moving, so long as you remember all the people that you used to be.”
Nice article about sadness in Doctor Who!