One of my first jobs was working at a call center for a large bank. I talked to about 50 people per day. 40 calls were usually pleasant. Of the remaining 10 calls, 9 were probably just good people having a bad day. However, 1 of the 50 callers was just a ‘jerk’ (substitute your favorite choice word here). This job helped shaped my worldview. Don’t worry about the 1 jerk and focus on helping the 9 ‘good people having a bad day.’ General nature of customer service and any phone based job. They are calling because they have an issue. You are put in a position to deal with angry people that are just calling because they are mad. Phone jobs suck. I know, I work in IT and used to work for a Managed Service Provider who also provided internet service in Madison. Company was great to work for but being on the Service Desk sucked giant donkey balls.