I appreciate the comments by @
fissionesque and some others in the thread. I did my time learning Mozart and Bach; I thought precision and cleanness are both good words for them. Some of Bach (particularly the Inventions for piano) are like clocks/machines just clicking cleanly away, and I know exactly where the music is going and could make it up as I go and be correct. I can appreciate that for what it is, but it doesn't necessarily inspire me -- I like structure + passion melded together, especially with twists I didn't quite expect and underlying structures that I can tease out of the chaos, so things aren't quite as chaotic as they appeared and there is still beauty among the dissonance.
(Like Dukas, Mahler, Bruckner, some Holst, etc. I can even appreciate Wagner, as bombastic as he can become at times. I think a lot of musical efforts in the classical realm nowadays get poured into the film scoring industry; I really enjoyed Don Davis' "Matrix" score, which was atonal in spots and had its own rhythm and structure but was still repeated as motifs woven throughout the score. I think these kinds of things intersect with my life philosophy, which has order and chaos woven together, bittersweetness as a dominant emotion, and lots of texture/complexity to sort through.)
Anyway, I think Mozart was a genius in terms of how quickly and efficiently his mind worked, and how much he produced. It just doesn't do much for me on the personal level.