[@The Harbinger of Ferocity] I echo your sentiment on fandoms.  The issue I see with them is that they can take alot of work to grasp the material required to engage with the story.  I use books/tv/anime as inspirations all the time in my own work,  but don't expect other players to enjoy or bother to consume the same media.

What fandom can offer though,  in my opinion,  is a world.  A roleplay that uses a setting from a particular work of fiction,  without using the events or characters,  can be enjoyable.  It's also much easier to read up on the setting of a work than to consume all of its events,  lowering the bar significantly for player entry.  If one doesn't just end up including all the relevant facts in their original OOC post. (which they should)

As for slice-of-life?  I think its much harder than most people think to keep one of these going.  I see this perception that slice-of-life means 'drop some characters in a scenario and watch'.  These types of RPs still need regular prodding from the GM to introduce new sources of drama when things get stale.