Sigmund Freud

Sigmund Freud was the founder of Psychoanalytic Theory.  He believed that our childhood experiences are stored in our unconscious mind and we are normally unaware of these memories but they can have a powerful impact on how we function.  He would've taken interest in the Hulk and Bruce Banner's pent-up childhood anger and abusive memories.  He would've seen Bruce Banner as a victim of this abuse wherein his memories were the cause of these outbursts of the Hulk's rage.  These two personalities can be seen as Bruce Banner as a representation of the Ego, and the Hulk as a representation of the Id.