Medical places gave me the most problems. From not being ready, to filling out airbills wrong, to pulling the wrong copies, to taping the orange copy to the box, to using photocopied billable stamps that had already been used, to using the wrong packaging, to asking stupid questions, to leaving before the close time, to not knowing they'd scheduled a pickup, to having four people call in the same oncall with three different windows - they were the worst. No other industry even came close.