Have to say I've been totally underwhelmed with latest Doctor and sidekicks. None of them are very good actors in my opinion. Matt Smith has played the Doctor 'by numbers' and the other 2, well they are 'planks' imo and have instilled no emotional response in me whatsoever. Having said that, the storyline has been excellent. When you look at the emotion and ability put into the roles by David Tennant, Billie Piper and Catherine Tate especially, it puts the current mob to shame.
Still, I've been watching it since 1963 and I'm not about to stop now.