i do a sound borad for a local band that plays a few times a year, all (usually) at no pay. it's a loabor of love and fun.
recently they did an outdoor gig, and kept bitching at me about how bad they sounded where THEY where listening. I kept telling them they sounded spot on out in the audience area. Took several others, including a guy who has run sound boards, to tell them I had them dialed in perfectly.
One never knows...