So I've noticed that most epic fantasy series of note, apart from having good writing and such, also have something special about their setting that makes them stand out. LOTR and Narnia were pretty much the first of their kind so they could be as cliched as they wanted but still be original. ASOIAF has gritty realism and super long season, WOT has the male/female magic split, the Abhorsen series has its absolutely amazing death system. You get the idea. But I'm struggling to come up with something that sets my setting apart. I'm not asking you guys to come up with something for me, but what I am asking is is this special feature necessary or is it just a gimmick? Do I need it or can I make a great, stand out epic fantasy purely through an intense, exciting plot, three-dimensional characters and a detailed world?