Speak for yourself buddy. Let's not start something else here, even with your big a.. IMHO.
I have no problem listening to HE500/Emo at moderate volume(9ish) for 3, 4 hours straight. While I can't listen as long and as loud to HD800/WA22. Each of us has different tolerance to different sound signature, music loudness,....
I could listen to my rig for 10hours straight without any fatique or ringing or headaches...3 hours is nothing in my book..my amp just got warmed up to sound on its best after an hour or so
But let us not open a can of worms here again..we have different hearing