What really grinds my gears is the amount of terrible drivers or should i say inconsiderate drivers there are on the roads nowadays,When i am sat in traffic patiently waiting and you get folk come past in the wrong lane then push in at the front of the queue as though they think for some reason they are superior to everybody else and should be at the front and not made to wait in line with us peasants,Or when you approach a roundabout and slow down or even stop to give way to traffic coming from your right then they turn left without indicating meaning that you stopped and the traffic behind you stopped because in most instances i guess the other driver is to lazy to flick a indicator stalk.What grinds your gears regarding peoples poor driving habits? All have a good day.