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

" I’ve said this many times to the dismay of people who say (usually parroting what their dealer told them) something along the lines of, “but it provides more grip” or “but the transients come out better with more power”. 

I have fifty years of experience in pursuing high end audio. Solid state amps benefit greatly from more power in the vast majority of cases. No dealer has to tell me that, it's not a rule of thumb to benefit sellers of high powered amps. 

I match the DB level to the year of release. So wish you were here at 75 DB is ideal. Burning down the house by talking heads at 83 db is fantastic. Gets to be a bit of a trial listening to car wheels on gravel Road by Lucinda Williams at 98 db. Can't yet hear anything made this century unfortunately

While I can relate to music "coming alive" at a certain volume (average 65-70dB in my room), I’m astounded by some of the higher listening levels posted here. I don’t expect I’ll ever have the resources to experience what @ghdprentice describes, but I’m OK with that. 

Mid 70s C weighted average, peaks low to mid 80s depending upon music.  One of my systems runs Altec 604-8G.  At those levels my homebrew SE45 amp is using less than a tenth of its 1.6 wpc.  The first watt really does matter.

Peaks around 75 dB when my wife is home.

Peaks around 90 dB when she's not home.

The dogs don't care how loud I play it.