Today each composer is not only involved in aesthetics, but he's actually trying to create his own language.
To the person that deals in visualizations, I suppose there is something rather exciting about a whole set of people - they all going symmetrically, up or down, in a military sort of precision.
Besides merely some pleasure that we get out of the combinations of pitches together and lines, I think that there is some satisfaction that we get in the fact of having this diffuse thing organized very concretely and put onto a frame and have it actually decided.
I think there have been some periods when the writing almost became a bit of a burden.
But in the end, music is ultimately an aural art, pure and simple.