I've had the pleasure of attending these things as a night shift worker. Fun, fun, fun! First, you get to hear complaints from the "know-it-alls" the complainers who think they can run the place and that we're all lazy, especially the night shift workers. Then we get hear the boss gripe at us. Some meetings consist only of in-service training--which is a blessing--but sometimes they're kinda boring. At times it's been excruciating to lose sleep to attend a meeting only to watch it turn into a screaming fest about how we're not doing our job. Then, after I'm thoroughly depressed and tensed up about my job performance, I'm supposed to go home and SLEEP??!??!!!?
By the way, the staff meetings have been rarer these days, thank God, and tend to be in-service and informational meetings. But I do wish that management would be forced to work nights from time to time and see things from our end.

And my boss has assured me that I'm doing just fine and don't need to pay attention to the nit-pickers. That's good news to a perfectionist.