I'd like to assign co-workers that punch out for breaks and never come back, or just end up not coming in at all, instead of having the decency to just say "I quit".
Having seven cashiers for all week when you're supposed to have six at all times.
People who don't pull their weight, forcing those who are already pulling their share to do more than they're supposed to.
Physically not being able to pull my own weight.
And if I haven't assigned them already, people who shoplift from secondhand stores.
Oh yeah. Also, being easily distracted. Missing opportunities. Waiting.