Conversation so far:
What was Pinhead's, from the Hellraiser series, personality like?
According to Pinhead Creator Clive Barker, his intended portrayal of Pinhead was an articulate and intelligent character.
What else can you tell me about Pinhead's, from the Hellraiser series, personality?
Described by Pinhead's human half in Hellraiser III: Hell on Earth as being very persuasive and very inventive, Pinhead prefers using coercive methods in order to obtain his goals.
Did Pinhead from the Hellraiser series have more than one personality?
It is revealed that Pinhead originated as Elliott Spencer, a captain in the British Expeditionary Force suffering from PTSD and survivor guilt.

Question: Did his personality have any weaknesses?
Self-contained rewrite: Did Pinhead's, from the Hellraiser series, personality have any weaknesses?