Matt Smith has always been an actor that has wanted to get inside the head of his incarnation of the Doctor. Varied research for the role has proven this, such as the actor watching old Doctor Who adventures before he started shooting his first series.
And with all that history that Matt’s been soaking up over the last couple of years, he’s started to notice character traits within the good Doctor’s nature. One such trait is his ability to move on very quickly from one “friend” to the next and how this can make the Doctor seem quite selfish.
“He’s [the Doctor] actually quite selfish. Because he picks these people up – often hot women – and then cruises around, drops them off, and goes, ‘See you later’.”
This certainly seems to be something that the Doctor has done on many an occasion. The Fourth Doctor left Sarah Jane Smith behind, the Fifth let Tegan run out of his life, the Seventh used his friend Ace to trap Fenric.
But behind all of this, there isn’t a selfish man, just a man. His friends either have to go due to circumstances (the Fourth Doctor couldn’t take Sarah with him as he had to go to Gallifrey – no humans were allowed) or because they chose to. And while they were gone, he met new people and moved on with his life.