Agree with all of the above. Here are a few more:

- An empty wine glass in C or F. (fill it or ask me if I'm ready for coffee)

- roll-a-boards (if can't fit under the proverbial seat in front of you: check it)

- Old-fashioned IFEs, where you're not in control of what movie you want to watch, and when

- PAX who are incapable of saying "please" and "thank you" to the FAs