even though this post is dying, and this is completely off subject, yes, if used correctly, I-IV-V-I is good music. in fact, if we take out the IV, the majority of western art music before 1908 can be summed up as short or long cycles that boil down to I-V-I. I think it is unfair to disregard the importance (and the wonderful qualities) of the simplest harmonies, because these are the harmonies that resonate with humanity most