Paul McGann on Susan and the Doctor
I found this interesting discussion between Paul McGann and one of the Big finish team (not good at recognising voices and he doesn't introduce himself) in the bonus track to "An Earthly Child", the new Big Finish play with him as the Eighth Doctor and Carole Ann Ford reprising Susan. (download extract here):

( Collapse )Funny that McGann, though obviously very aware of Hartnell's Doctor, had never before heard the Susan parts of the back story. But I think he and the other guy successfully identify why the Doctor has never since been portrayed as having a family.