This sounds ridiculous, but stay with me, please. Many of you have probably played that old staple, D&D, or its many cousins and descendants. Under the skin of the earth, a short distance from the town, there is a great stone-walled complex full of monsters, who have hoarded treasure. An entire ecosystem of adventurers, pawn-shops, and specialized magical creatures has grown up around this common niche. And, of course, there are the monsters. These are their stories.
You throw in some shapeshifters, succubi, a vampire, werewolves, and the wildly varying other creatures of the FRPG genre into this big windowless mansion. They apparently manage to get along and live together. Who's to say they might not be friends? They have to get up to *something* between periodic raids by the sword & sorcery set. Who knows what could happen with that amount of free time? Let alone what they might do with any hapless treasure-hunters who might fall into their clutches.
I picture this as a sort of ensemble-cast erotic dramedy, played as straight as possible within the limits of the premise and the tropes. There should be strong elements of fantasy, dark fantasy, sexuality, human drama, and horror. The players just oftentimes happen to possess winges, tentacles, scales, and inhuman lusts. I think what we make of it would depend greatly on the GM and the other players, and who chooses to play what. I think there's even room for the innocent barmaid from town, the dashing rogue swordsman, and various other less 'monstrous' characters.
If someone feels up to running such a thing, I think we should riff on it and see where it goes. I would prefer that there be some kind of game system underpinning the whole undertaking, even if we keep it fairly loose and roll dice only with the greatest irregularity. I'm not terribly particular about what that might be, I just like having numbers attached to characters in this sort of deal.