well one of the things that I was thinking about was having levels of integration into society.
Total integration would be were it was the norm for most things, maybe a replacement for science. This would be most settings that are like D&D were you can go into a shop and just buy something magical but low powered.
Then there would be settings that have no standard magic items at all but still have some magic users such as Shadowrun where the magic items are foci for the magic users.
I'm trying to figure out good levels between these two.