It really grinds my gears that, whenever I wash the dishes, if after that I find a single spoon or plate, I get mad. I mean: I JUST washed the dishes, for God's sake! Can't you FRIGGING wash a SPOON?! Grrrrrrrr...!
Another thing that grinds my gears sooooooooo badly is that they interrupt me when I am eating. I go to my bed, rest my back on the wall, stretch-out my legs, put my laptop atop my legs and watch YouTube while eating. It gives me TREMENDOUS work to get out of this position PLUS putting the plate on my drawer.
Seeing the trash bin FULL of trash grinds my gears; someone leaving the bathroom mirror-cabinet open grinds my gears; getting my schedule interrupted grinds my gears
A more recent grind-of-gears: my Social Sciences' final was a mess. First the professor said it was going to consist of five questions: one was obligatory, and you could select the second one from the other four. You have to write an essay per question. Then he said he was gonna give TEN questions: two obligatory, one to select from. Finally, he opted for giving ONE mandatory question, that question has two subjects and you have to select one. The second question you can select from an array of six. To summarize: the structure was a mess because he kept changing it... ==__==