I find that little annoyances are always far more irritating than their larger counterparts, especially if there's no obvious way to get rid of them.
One of these "little" annoyances on my Samsung Galaxy S4 is actually quite tiny, but it's enough to drive me crazy, and most likely you too. That's the "Select input method" notification and keyboard icon that appears whenever the keyboard comes up. See that little keyboard icon of the left side of the status bar? Here, let me zoom in for you. I always see it, and it's the most annoying thing to me! If that wasn't enough, you've also got "Select... more