My system has to give me emotional response - meaning I listen to be moved. Accuracy or detail are not really relevant, but I do get a buzz from hearing that little noise not heard before.
Often I fail to get sucked in, but when I am in the right place, mentally, I will often shed tears and have the biggest smile, even at the same time.
I have never been able to describe what one bit of gear does or sounds like, but I do know what sounds better TO ME. That is all I care about really.
Live music can be amazing, but rarely am I relaxed in my own home when I hear it, so I cannot become immersed in it. My father was a musician, and as a kid I got to hear lots of live music at home which was fantastic. Living where I do there are few chances to get to any concerts, but there have been a few times when I have listened to musicians jamming, and the pleasure is there, but it is different from being in my house, listening to what I want to hear when I choose.