Mickey is a traveler who goes from place to place trying to help people - and he wants to help both people and vampires, in that he wants to cure vampires or at least find a way for them to keep living without hurting humans. As such, he won't want to hurt a vamp right away unless they hurt him/hurt someone else.
That said, his naivety/I WANNA HELP EVERYONE attitude may lead to him getting nomm'd if you are inclined.