"Once they're in, people stay for life," says U.S. Postal Service media contact Dennis Tarmey, referring to employees.
Many employees at the says they enjoy interacting with customers or, for letter carriers, just having a job that gets them outdoors and not stuck in an office all day.
According to Tarmey, letter carriers, because they're so familiar with their route, can also be helpful in watching out for the community. Letter carriers have sometimes reported robberies and fires, and helped elderly who have fallen in their homes.