When is your Hifi good enough?

Just wondering what makes people tick in regards to determining when things sound "good enough"?

For me I have a vision in my mind of how things should sound based on what I have heard over the years.  Once it sounds that way, I am done.   I can still enjoy listening to other sounds or sounds that omit some things I might want otherwise but if I do not get regular samplings of "that sound" I probably start to wonder.