"Cult" is a pretty subjective word, really. Consider when one talks about films that have a "cult following". All this is really saying is that the whole nation didn't seem to love the film, and so those that do like it for one reason or another are said to be "cult-followers" of the film. This is meant to imply, I think, that they must be strangely hung up on the film...because the ordinary person decides that based on an ordinary viewpoint the movie is just too ordinary to impress ordinary people. By this strange logic, the "cult followers" are deemed to be "out of the ordinary", which I guess could mean many different things. Whether or not the term "cult" is used with a negative or positive connotation usually has to do with its juxtaposition to a set of standardized values. Who is to be the authority on those values remains unanswered.