Despite never really having any problem customers in my 14 or so years of working in food service, I'm right there with you. Between the stress of dealing with people day in and day out, working every holiday with no overtime or holiday pay, and being expected to do the work of 2 people and not take any vacation time because "the company can't afford to hire more people," I will never work retail/service again. People talk about dreaming that they're back in high school, I dream that I'm back working there. Even 3 years after I left the industry.