I think we'll call him doctor too. Don't know why, it just seems really fitting for this model - slightly disturbing and ready to apply his knowledge of human physiology in Q&A sessions.
Quite happy with the way he turned out.

Parts for the mini:
Head: Victoria Miniatures
Torso and powermaul: GW genestealer cult
Right arm: GW Mordheim middenheimer
Left arm: GW Empire general
Legs: GW chaos sorcerer
Shiled and book: GW greyknight accessories (I think).