OK, let me put a cat among the pigeons here and ask this: Disregarding a miked situation - which is significantly artificial, and restricting ourselves to purely acoustic gigs, how many drummers have actually had a non musician audience member comment on the sound of the drums, for good OR for ill? I ask this because, apart from the suspician that we are utterly self indulgent - and why not, I hasten to add - I have been accosted so many times, after having played someone else's drums as a guest performer, by an audience member who wanted to know why the drumkit sounded so different (I'm being modest here) when I played it. What startled me each time was the fact that they noticed: hence my question.
BTW: I answer them with either "Years of practice." or "It's the way I hit 'em." depending on my mood at the time.