My system needs to do it all. I have a number of selections which I use to highlight difficult passages, including amplified rock, pure acoustic, electronic, etc. I'm not happy until all sound right to me. By "right to me", I mean no faults I can identify; no mushy bass, no zingy or plinky treble, no gauze around the performers, coherent voice, decent imaging and soundstage. Transient performance is particularly important. I am very sensitive to snares that go thump instead of snap, and cymbals that go pushhhh instead of pishhhhh.
There are systems that do all of the above better than my system, but my system meets my standards. It holds my interest for hours of listening every day, and never does anything to annoy me. Any improvement would cost more than I am willing to spend, so I'm done. All I want now is the time to continue enjoying music.