I’m annoyed with opening mail. I open all the mail at work, and I really wish there was a universal way of folding letters. You do not need to fold a piece of paper so it has 3/4/5 creases in it. It should have 2 creases and that’s it. A simple letter fold with the back side of the paper facing out, or an accordion fold is all you need to do!
Anything else is wrong!