Quote (Superchum @ Jul 28 2011 06:12pm)
it's beautiful motifs or smart chordal arrangements
But this is exactly what makes jazz so beautiful. Harmonic depth allows musicians to explore new ideas and to keep the listener on its toes. It is not just for the enrichment of the listener's ear (although that is a primary component of why jazz musicians tend to listen to jazz); it's also for the enrichment of emotional development within music. It can be harder to see why some of the more technical aspects of jazz are used for the purposes of emotional development, so I'll try and give you a simplified example of what I'm talking about.
Let's say you have a picture of a happy face; it's artistic but not of any particular quality. It is art in that it represents an emotion, although it is not all that provocative by itself. Let's call that the major chord.
If you play a maj7, that happy face becomes a little more pensive and a little more insecure.
If you play a 6/9, that happy face becomes exuberant and satisfied.
If you play a 7, that happy face becomes excited.
If you play a sus, it becomes a thinking face.
If you play a minor chord, it becomes a sad face.
If you play a mi7 chord, it becomes a face that's difficult to read and beyond reproach.
If you play a miMa7 chord, it becomes a face of terror.
If you play a split chord, it becomes a tense face.
If you play a dim7 chord, it becomes the face of uncertainty.
If you play an aug chord, the smile begins to remind you of a serial killer.
If you play a 7#5 chord, the smile becomes uneasy.
If you play a 7#9 chord, it's the smile of the guy who just punched you in the face.
If you play a 7b9 chord, it's the smile of defeat.
IF you play a 7alt chord, the smile begins to become obfuscated: There's a face, you just can't tell what it's doing.
If you play a maj7#11 chord, the face no longer notices you and begins to look at the clouds.
And with all the context that you've created with the jazz you've just played, you're not really sure if the major chord really represents a smile at all, and with so many emotions in the air, it's difficult to take any one sound at face value. Don't give me this "jazz isn't emotional" BS; it's there.