The downside to a magical world is if you get everyone to use magic to solve all their problems, this is going to be pretty boring for your reader. No conflict = no problems = no story. Also I would have thought magic is bound to have an impact upon the body of whoever uses it. In my Fairy Kingdom I emphasize the fact magical usage drains powers, which obviously can be topped up, but it made sense for ne to show my magical people as using magic when they need to and using other methods to save on wear and tear on themselves!
For those whose work is magic (e.g. say a chief wizard), how do they stop their best ideas being stolen? How do they use magic to help enhance their life without feeling literally drained because they're using this power all the time? Who carries out the lowly jobs? How is your society structured in terms of employment?