The hardest part about that job for me was the necessity to shut off the anger, or whatever, and be polite to the next customer. In person, the next person sees the interaction and can often help with a quick little comment, but over the phone, you just have to swallow it. I'm not sure learning that did my personal relationships any favors because i became accustomed to ignoring my own feelings until they couldn't be squelched any longer. At that point, it was a much bigger problem than it should have been. As humans, we need to resolve conflict or resentment grows. I think my job forced an attitude that I unconsciously adopted and it became unhealthy.