I have been a huge fan of both J. R. R. Tolkien, and his best friend C. S. Lewis for forty years. Most people aren't familiar, but Tolkien's formulation of Middle Earth was a genre defining one.
After Tolkien, many writers picked up his world creation with so few changes, that this eventually defined a sub-genre. Terry Brooks with the Shanara series, Gary Gygax with his creation of Dungeons and Dragons, both helped define what is now known as "High Fantasy". We think of elves, dwarves, orcs, goblins, etc. in stereotypical fashion we do, because that is what high fantasy is. It entitles us to certain assumptions, even if they are in rare cases violated by romance between an elf and a dwarf. BTW, D&D second edition and following are not high fantasy, because each edition added so significantly to our expectations, with new races, etc. Creation of the drow kicked D&D out of the High Fantasy sub-genre, as did "balancing" the races instead of making the world centered around mankind. (That's just one reason First Edition D&D is so much better than all that followed.)
I can never get enough of it. I'm thrilled that there's going to be creative oversight by the owners so hopefully we won't see new races suddenly appear, nor mages with world shattering powers that make everyone else impotent by comparison. Tolkien had strict limits that were designed so that even the smallest Hobbit could make a world changing contribution, and so kept the story on courage and character rather than who has the biggest fireball.
Really looking forward to this.