Stand-ups consisting of everyone either A) trying to prove they actually did work yesterday in as many words as possible or B) taking this as a chance to have a nice chat with everyone. Hour-long daily stand-ups are not agile.
The worst though was the planning meeting for next sprint, where no one had a #$%^ing clue what they needed to do, what the priority was, where the dependencies lay. A day every two weeks you dread.
I think the big take-away is not to do Agile for Agile's sake. Do it to solve a problem- if developers don't know what each-other is doing, there's solutions. Working on a product with changing requirements? Work in sprints to be able to respond to that. But don't do it because it's what all the cool kids are doing.
EDIT: The inverse is also true, people. It's not supposed to be a religion, you can pick and choose practices and processes to fit your requirements. Do what you need to do to achieve the goals you want to achieve.