Does loudness play a part in your appreciation?

For the most part,I enjoy the music I'm listening to regardless of volume level.HOWEVER,there are many times when a song triggers associated memories..Most all the time,those songs are of the variety that are high energy & I'll turn that volume knob clockwise which does seem to add to the enjoyment factor...

It's a great question actually. I've wondered about this myself some lately.  

A friend and I were comparing listening sessions recently and I realized we like to listen at different volume levels. And, thoughts around how each of our systems will sound different if he's listening at 80db and I'm listening at 70db most of the time.  

My system's character changes overall when comparing 65,70,75,80-85db listening levels. I don't care for how my current system sounds when the volume level is turned up really loud. My level of interest and engagement drops notably.

With or without my hearing aids?

As others have indicated, 70-75 db at my listening position is a good range to comfortably enjoy the hi-fidelity of my system without stress. Above 80 db starts to get uncomfortable.  

With my Tube Raven Audio Reflection and having tinnitus and playing at 65 db I hear the ringing and the music and yet if I really really pay attention you still hear detail that is different than say 75db which is loudest I play...At 75db OMG the sound god comes alive and at times No Ringing and just music and the tubes just dissect the music into 3D sound stage and I am fully engaged into it until a moment I think about my ringing tinnitus and then I hear both ..But during that time of silent ringing is a moment of listening to music that makes me feeling  relaxed..