House numbers. Now you'd think it would be easy, odd numbers on one side, even on the other. But for some reason my delivery job keeps taking me to places where they can't get this right. Instead of 1,3,5 etc on one side and 2,4,6 on the other, you get 1,2,3,4,5 and so on on one side then it goes back on itself. So you get the first and last house number next to eachother.
When trying to deliver in the dark and pouring rain, this gets rather annoying!