What hasn't been done? lol. But seriously, I actually do believe that all plot lines have been "discovered" and every story concept "explored" - it's simply a matter of angles, character development, voice of narrator, POV, strength of writing, etc. This is what makes story telling interesting, imo. After all, how many of us have read LoTR multiple times? If it's been "done once" then one time through should be enough, right? But something done once doesn't mean it's not worth doing again. Again, imo. Not meaning to turn this into an argument, lol. Just started writing and had some thoughts all of a sudden!