I think my vamp and his/her mage will get along very fine, or not at all. Being a mental librarian- as in having an ungodly amount of books in his head- he'll have so much knowledge, most of it being more or less useless for the practical world. But for a mage, oh, he might as well be a master (even though he never practices) to her, whatwith undoubtly reading hundreds of books, some of them being magical.