[Marvolo]

I think you can define quality by a product delivering what you were looking for at a reasonable price and/or a product fulfilling a need amply at an affordable price.

So to a person who craves the type of fantasy Terry Goodkind writes, he produces quality work. The same with Tolkien, Jordan, Martin, etc.

Folks who crave stories with creepy settings and in depth character backrounds with horrific conclusions find quality in Stephen King's work.

That definition seems to suit for me. I'm sure someone is going to pick it apart but... oh well.