Lol, where to start....................
7. Red gamblers!!!
8. Lack of merging skills.
9. Lack of indicators usage, or completely incorrect use.
10. People who check what's coming whilst waiting at an intersection behind you - number one cause of nose to tails.
11. Weaving in and out of traffic in a dangerous manner.
12. Rubber neckers - another reason for unnecessary accidents.
13. Lack of use of headlights when legally required - ie dusk and dawn or bad light conditions - torrential downpours or fog.
14. On the motorway or dual carriage way, people that come in stupidly close as they pass to check out whatever car I'm driving that day.
15. Poorly maintained cars, especially those that have stinky exhaust fumes/blowing smoke (illegal) due to lack of being serviced.
16. Hit & runners (more substantial damage) or others that damage your car or cause door dings in car parks.
17. Basic bad driving skills.
18. In attention to the job at hand... driving, not reading the paper, playing with sat nav, doing your hair, shaving, putting on lippy, eating etc, etc, etc.
19. People that drive gutless cars, that insist on driving in the fast lane doing 70/80/90kms on dry road conditions and won't move a lane to let others past.
20. People on a single carriage road, maybe 100km area that sit at 70/80kms for no good reason, in ideal road conditions, then before the passing lane they speed up to ensure you can't get past without exceeding the speed limit, then slow back down to 70/80km immediately after the passing lane.
21. People that cut corners on a blind corner, often at speed.
There are lots more, but that will do for starters.