My pet peeve are double parked cars and trucks. There is a street I have driven on, on occasion, where this is the norm. It's a very long street and a major one running through several business districts in several towns and cities. Driving it is like driving an obstacle course, especially at night.
This is made even worse with the cars trying to get on to this busy road from side streets that have no traffic lights. Left lane, right lane, you get it either way.