I work FOH for an A room. I deal with the cream of the crop, and I love my job. Last night we had a local band (they rented the place, and me with it) for some kind of private party. They were pretty good. Mostly in tune and on time, they could sing,etc, etc. Part of being a performing musicians is knowing HOW to perform. EG: The keyboardist's patches were all different volumes. I had to be on top of it all time. Neither guitarist even tried to do their own dynamics. They would solo at the same volume as their sweet little fingerpicking parts. Every effect on their pedalboards had a different output. The percussionist clapped his hands 4 inches from his overheads, and even hit a mic with his tambourine (on purpose!) (thank God for limiters!). Plugging in things, and unplugging them on stage without muting! Inexcusable. Starting every set with tapping on, or blowing into mics. My job is to make sure they are muted, or unmuted. No need for that. Complain that the lights are bright. I would gladly turn them off for you I got a good sound happening, but they made my job 20x harder by not knowing the basics of performing. Playing your instrument proficiently is just part of the business.