During my 36 years carrier I had a few jobs I hated to go to but always was able to overpower myself in order to bring in pay. Twice it was due to a bad boss who managed skilled techs but had no any training or experience in what he managed. Yet much more hated were constant nightly emergency calls in, sometimes twice in one night, driving to a plant half asleep and working with machinery (Chillers, boilers, huge air handlers, high voltage etc) because some companies had no night shift coverage yet operating 24/7 manufacturing. There were also jobs that I enjoyed to work at despite occasional calls in which were not so frequent. Yet I knew that my time was up as HVAC tech when I no longer could do it due to health issues.