Appreciating all forms of music doesn't mean that you think everything is good. There is crap music in every genre. What makes good music? First of all passion/soul. An artist with passion is the kind of person who would be continously working on making their music better or atleast, expanding their horizons. If you take a look at some one like Miles Davis who was always trying new ideas, playing with different musicians, and actually trying to create something new and exciting, then look at an artist like Weezer who was stale from the beginning, and basically recorded the same record five times, it's obvious that Weezer just didn't have what Miles had.

Now those are just examples, but the idea applies to all music. When I say something is crap, it's because it is. I never will say that with out giving the artist a chance first, but when you listen to music, you have to ask why? What was the point of this? Where is the substance?