*Slow moving vehicles partially occupying two lanes and wouldn't yield to anybody faster or overtaking from the back.

*Vehicles entering a one way street in the wrong direction. Unyielding and sometimes with their high beams and hazard lights on.

*Vehicles (esp taxi) who like to snake into my lane. I have a habit of leaving a car length or less of space in front, for momentum purposes.

*Vehicles who like to counterflow and when incoming traffic arrives, they suddenly force themselves back into the proper lane, at the annoyance of others religiously waiting in line.

*In lieu of the ban on siren/wang-wang in private vehicles, some drivers use their high beam and hazard lights and driving as if they suddenly attained special powers.

*Drivers who don't use their turn signals.