Just as much as you all complain about poor LBS service, the same can be said about customers. There are always really rude customers that expect us to treat them like God.
1: The customers who expect their POS NEXT to run like a $1000 bike for $20 of service! And then they get mad that it doesn't run perfect
2: Customers who expect to jump the repair queue. I had a guy come in two days ago that I had told him in the dead of winter that he needed a new drivetrain (cogs and CR skipping and pointy, chain on its last life) He didn't have the money at the time and said he will be back in the spring when he had money. Well when he came in the other day, he said well you told me in DECEMBER! that you can get it back to me the next day! Well yes in december when I saw maybe 1 or 2 people a day I could have gotten your bike back in a day, or even the same day, but not now.
3: Along the same lines, a few customers think they are King (or queen). They drop off their bike and say "I need a full overhaul, new this, this, and this. Ok I'll be back in an hour" Dead serious!
4: people who expect a small shop to have obscure and expensive parts in stock. Then they get pissed off that we don't have it. Oh you don't have Super Record in Stock? no Gibili disc wheels, Boras or Corima Trispokes? Well we can order it and have it for you in a week. No I need it now.