I have a co-worker who can be difficult to work with. He’s not difficult in a bad way, but difficult in a way that makes you work harder to be better. He is very detail-oriented and wants to be overprepared for any scenario. Last week before a product presentation, we were reviewing all the equipment and information to make sure we had anything that our new clients might need. I hurriedly tried to reassure him that everything would be ok, but he insisted we double-check every last detail.