I think my pet peeve is the icons in the Finder. I don't consider them intuitive in the slightest, you just have to learn what they are by Googling it or clicki

I think my pet peeve is the icons in the Finder. I don't consider them intuitive in the slightest, you just have to learn what they are by Googling it or clicking them. I also learn about hidden key strokes for navigating the Finder to actually find stuff. Very useful once you learn them but otherwise they are hidden away so it seems virtually impossible to see the file system as a single entity.