It’s interesting to see what kind of shows produce huge tumblr fandoms and those that don’t. The Sleepy Hollow fandom seems like it sprang up overnight and is pretty large, based on how fast the tag moves. In contrast, Copper and Hell on Wheels, two shows I recently started watching that both have multiple seasons, have almost no presence on here at all. I don’t know if the difference is based on the size/availability of the network that produces them or the settings that may not be as widely appealing to the tumblr demographic? It’s probably a little of both, though each show’s network (BBC America for Copper and AMC for HoW) do have what I perceive to be popular fandoms in Orphan Black and The Walking Dead respectively.