What is your listening level?

There is no general level.sad to say every recording has a level at which it sounds best which varies from one to another.
I had a friend who had a circle with a line drawn to represent optimum level of a volume knob on all of his records.
At first I thought him nuts,he wasn't- though I would be if I went thru all that.

I aim to achieve a scaled to my room proximity to what the music might sound like if I were to hear it live, in what I would imagine to be an appropriate setting. My room couldn't accomodate a symphony orchestra, so the volume would be scaled down considerably. On the other hand a recording of a solo recital in a rather small venue might be played at nearly live levels.
Schubert, that's a great idea, if you never changed gear, never changed rooms, ambient noise never changed, each track of every recording was consistent, only listened alone, and one's hearing never changed.
Still a great idea for a baseline. I'm surprised no has marketed little removable stickers for just such a purpose. Perhaps in different colors for different places, i.e. main room, car, bedroom, etc..

My level music listening is I'd say proficient.
My level of equipment listening of recordings is I'd say advanced.
I always try to keep real volume not for large symphony orchestras though.

Its up to you ,110db is good ror rock and roll.

110db is good ror rock and roll

Sure, if you're an audiologist or a hearing aid salesman ;-)
Seriously, 110 dB is loud enough to cause hearing damage in under 2 minutes. Too much live R&R w/o hearing protection is one of the things I regret about the 60s. I know that there were some others, but the due to the activities that accompanied R&R back then, I can't seem to remember what they are.