I disagree: I think that RTD's underlying vision for the Doctor is somewhere along the line to Lance Parkin's (ie, he's superman) but that he feels it gives the illusion of depth if he occasionally lurches in the other direction -- though he's careful not to be consistent in this or actually use it to bring any depth, because that will 'alienate the casual viewer': rather occasional lines like 'I think you need someone to stop you' are considered enough to point to as evidence of 'depth' before getting back to superDoctor.