Menkner/Hooks

Books: Talking about books of all kinds is a sure hook. The rarer, the older the better...add obscurity or a "strange" subject, you have a winner.

Supernatural Creatures: He is very interested in supernatural creatures (apart from Vampires) of all kinds.

Vampires: Since he does not really believe in them, "proving" Vampires to him will surely spark interesting RP.

Time: Everything concerning the manipulation of time either with magic/powers/technology is of greatest interest for him.

Anti-Age/Immortality: All matters of prolonging one's life or even attaining immortality.