And it might even be that these different personality pieces (Id, Ego, Superego) actually have different locations in the (different) brain(s), (which would be pretty awesome - Freud with his limited information actually having glimpsed structural information about our nervous system would be insane), distributed in the way you just mentioned. Many subconscious decisions depend on very basic impulses, the kind of which the brainstem/midbrain is responsible for. This might have repercussions into psychiatry and psychotherapy.