Most of those already said, but my biggest is drivers who think the correct response to a traffic light turning green is to sit and stare at it and try to work out what to do next.
The sub-group of those who stare at the green light and move off when it turns amber (so the car behind can't follow without crashing the red)
People who are discourteous to learner drivers (and not only because Gozza Junior is one at the moment).
Following on from Parksy's comment, I've never done HGV but I've done a lot of Advanced Driver training so I know the importance of allowing a moment of irritation, then letting it go and moving on with my life!
The sub-group of those who stare at the green light and move off when it turns amber (so the car behind can't follow without crashing the red)
People who are discourteous to learner drivers (and not only because Gozza Junior is one at the moment).
Following on from Parksy's comment, I've never done HGV but I've done a lot of Advanced Driver training so I know the importance of allowing a moment of irritation, then letting it go and moving on with my life!