OK, as a congregant and now as a colleague, there is much to be said for likable ministers. It's hard for me to imagine wanting to have a minister or be a minister who was not likable.
My concern is the risk of giving too much weight to likability in an interview and therefore in the entire examining/fellowshipping process. Even people who behave despicably can give the appearance of being likable for the length of an interview. And quite likable and well-qualified individuals can "freeze up," hiding their merit under the fire and ice of panic. Finally, ministry sometimes calls for not being likable, e.g., when telling truth to power.