"Probably some of my biggest disappointments have involved coworkers who have retired or moved to a different job site. After spending so much time with certain people, you really get used to working with them and enjoy their company. I really think we spend more time with our coworkers than we do our own family, so when one of them moves on, it can be a tough transition. In my last job, several of our supervisors retired at the same time. It was great in that it opened up advancement opportunities for the rest of us, but it was also pretty disappointing that we no longer had their knowledge and friendship on the job."