1 Indecisive drivers who seem to be terrified to merge into the traffic flow at roundabouts or waiting to turn across traffic at intersections plus the muppets who merge into hi speed highway traffic at suburban speed and seem to have a brick under the pedal going by the snails pace they are driving.
2 Tailgaters
3 People obviously on their gadgets at traffic lights with heads nodding up and down and are not ready to move off at a brisk pace when the green lights up.
4 Red light runners I see so many that it almost seems that it must be a part of the test.
5 Never knew that there were so many secret agents on the roads as so many seem to be on a mission and fail to indicate their intentions or if you blink you will miss the single flash when they are 1/2 way across into your lane if they bother indicate at all.
6 Drivers who know that they are going to take the next exit but stay in the "fast lane" until the last second and then overtake and suddenly spear across the front of you when there was miles of space behind you and could have easily dropped in behind.