As a fan of the beboppers, I have to say that a lot of notes can sound great when used properly. It is the effect that the notes create together, a "wall of sound" that is heard, and the sound can be amazing. It is hard to play a slow solo well because every note you play is completely integral. It is hard to play a fast solo well because you have to stay focused (aside from the technique problems) and make sure that you are not simply mindlessly playing notes.