Forgive me if I have not read all the amusing (I do use that term loosely) comments about why a system comes out at night, so if I hit upon an answer that has already been posted but I did not see one. I know for me I like it dark as a lot of the responders said. That means you lower the blinds or close the drapes, thereby eliminating the biggest sound distorting source in the room those windows. The second reason is metaphysical you intentionally have eliminated all other stimuli (phone computer) {or at least I hope you do} with the sole goal of listening to music and nothing else therefore your mind can is working at full capacity to hear the music and nothing else! I know that sounds crazy because we're not accomplishing anything, but the music sure sounds better!
DISCUSSION: "It only comes out at night". Does anyone else have this experience!?
In my listening experience, whatever system you have, whatever components, whatever the material, medium, one thing always seems to remain constant. It ALWAYS sounds better in the deep and still of the night!!!
Is it because night time is generally quieter? Is it because the world of electronics is then shielded from the SUN? Is it because there is less demand on the electrical service?
Whatever it is, there is one thing I know for sure, music sounds better late into the night!