Parents who have the day off
The only thing more annoying than knowing that ALL of my clients have the day off work and still brought their kids in today (which means that I am missing my own child's performance in a school assembly), is that ALL the kids also have a cold. Snot everywhere, sneezing on everything and constant crying.
I should have booked the day off as part of my paid holidays - lesson learned for next year.
I feel like my frustration and resentment just keeps growing and I really need to find a way to get over it!