Parts counter folks have what I'd think are the hardest job of all. Long hours, weekends, often customers in a hurry, need to look up a bolt on a 1984 lawn mower deck and turn around and find the right oil to put in a gearcase on a combine or something while putting away the parts that may or may not have come in. Oh....now that you got that bolt found, I don't actually need it. Just wanted to take pictures and measurements and find it online somewhere. 

I have respect for those people....I'm not sure I'd be good at it and others find that out once they're in the job. Be thankful for the ones you have