Consistently selling books like Stephen King?
The grammatical guidance of Strunk & White?
Plotting the essence of a story like Joseph Campbell?
Danielewski's derivations of Derrida's deconstruction?
Breaking Bad? Hannibal?
Maybe 'good writing' is communicating a clear idea in a memorable, entertaining way. I don't know. I'm not even sure if writing has use in defining such a changing concept. It seems a popular topic anyway lately. What do you think?