The only things I ever obsess over are spitty sibilants and screechy violins. And oh yeah, boomy bass. I enjoy the heck out of imaging and soundstaging, but if it ain't in the recording I ain't gonna go crazy.
Do you spend more time analyzing the sound of your system, worrying it could be better?
Great article here from Dan Wright of ModWright:
If it Sounds Good, It IS Good