Answer away folks, let's here some 更多 good ones! XD For me, I'd have to say a number of things.
*When 你 显示 someone a song 你 like and they don't even bother to finish it.
*When a restaurant takes forever to make your food. (One time at Applebee's, I kid 你 not, they took THREE HOURS to serve my family.)
*Homework in general, shit's horrendous no matter what age 你 are.
*DUST. IT ALWAYS COMES BACK AND ACCUMULATES LIKE BACTERIA.