For me it does.
emotion may be a bit much at times, but there has to be something worthwile. Surely sound in and of itself is worthwhile, but random noise is not for long stretches. So, i think there at least should be a story and whether that story is largely contained within the music itself or rather more expressed through a context provided to the music leads to some very different products. The latter runs a much larger risk of becoming dated or simply being misunderstood.
Improvisation for the sake of improvisation can be very interesting academically but often adds darn little to my enjoyment. I prefer artists who have a more emotional story to tell.
(sorry to rake up this stuff again, but I got around to this only now, please feel free to read and discard)