These are my main bugbears as a cyclist. The amount of time I can’t use bike lanes because there are cars parked in them is ridiculous, especially in central Manchester.
Following that, and relating to some of the discussion on New Speed Limits, I find it funny when drivers insist on overtaking in low speed limit zones where they usually have to break the speed limit to pass me (especially in a 20mph zone) and almost always come to a halt shortly after at a set of lights. I then go past them to the front of the queue for the lights and the process repeats up to the next set of lights.