I enjoy settings where the limits and boundaries are not so clear and the tropes are not so rigid. A cookie cutter rpg world where mages are low hp and low defense and the player is fighting to collect 7 special gems to stop the evil from destroying the world in the name of the light, is not all that interesting.
Bias bias bias but I really liked The Continuum's IP. There was potential to open up just about any theme with expansions, and all the the existing themes did not need to exist in a single world cohesively due to The Crossroads being well, a crossroads of different worlds. We end up with vampires fighting dudes who can shatter the earth with their fists, cool stuff like that.