First, I want to talk a bit about the philosophy of philosophizing about storytelling. You might think how good a story is is subjective, and I can't claim a story is bad just because I didn't like it. But if you believe that then what's the point of even talking about this stuff? If the quality of a story is subjective, then all this talk about the way any element of a story "should" be is meaningless, so what are you even doing on this page? Now that we've cleared that up, here's my repository of thoughts.
Magic systems (old half-baked thoughts)