Facebook, grrr, nothing but pictures of kittens all day. Grinds my gears so it does. Have to avoid it first thing or I'm Mr Angry for the rest of the day.
Incidentally, IME and completely unscientifically, I find that the trade of the HGV seems to make a difference.
Construction vehicles in general and skip lorries in particular seem to make closer and more aggressive passes than many another HGV when I'm on the road. I often wonder if its either the nature of the business they are in, getting dirty all the time, or the pressures those industries put on them.