Soft all the way. I can't stand it when a story gets so bogged down in the rules of magic that it takes 1. all the mystery out of it and 2. gets so bogged down in the exposition of its magic system that the plot doesn't move forward with ease. I don't know, it always seems that hard magic systems always somehow end up breaking their own rules, too.
Like, in my story, I wrote that some people just have magic in their bellies, some people can heal, some people can use magic offensively, and some people can use it to calm other people down, and that was really all I wrote.