Cult Appeal
The kind of appeal that whips up a frenzy within it's fan base and where the mainstream is largely unaware of it. Having a quality where fans find it extremely exciting to share their deep connection to the object of appeal with each other. It's possible for something with cult appeal to spread to the mainstream as long as there still is a strong contingent of fans that exhibit almost a cultlike zeal for the object of appeal.
Kevin Smith's work has cult appeal.