What decibel level do you listen at? What is ideal?

67 to 72 for most.

Used a meter to test my main system.  Usually stays under 70.  Trying to save what’s left of my hearing. Wear ear plugs now at concerts. 

I prefer mid 90s (average) - lots of immersive energy and "you are there" presence, but not too much to be uncomfortable for a reasonable 1 - 2 hour session (with breaks). Don't listen daily, but really enjoy when I do. Never subjected my ears to loud concerts or guns (without ample protection), etc - doing fine so far. 

There is less chance I'm going to like the same things (gear and music) as say a 70dB listener lol. 

I listen at around 88-91dB in a smallish room and I never change the volume.  Once you set the correct volume for the room you don’t need to change it. And before anyone ask no it’s not dependent on the genre of music. The right volume IS the right volume for all music based on a particular source. 

@ghdprentice 

+1 …. Big time.

Setting aside the important factor invoked by one’s age , the better the  resolution capabilities provided by your audio system, the better the dynamics, slam, and audio presentation at even modest lower volume levels. and avoidance of fatiguing and/or irritating volume levels.