My personal irritation....having to eat ice cream
with a metal spoon. the spoon gets too cold, and touches my teeth and it hurts. Plus the sound. I have a camping spoon (neoprene or something?) that is perfect for ice cream.
DH would say 'the way DW eats ice cream'.
I don't empty the spoon, I just kind of take off the top layer of the ice cream, leaving a smooth oval of ice cream on the spoon. Takes two-three times to empty the spoon. I started doing it because of the metal spoons years ago, and now it's a habit.
My worldly irritation? People who don't clean up after their pets. Nothing worse than running after the grandkids through the grass at the park and running into a pile of dog poo.
(not a silly one, I know. I try to not get irritate by silly things, saving my irritation for the bigger ones.)