-Blocking roundabouts preventing other vehicles from going straight across (i.e. you are at 6 o'clock, wanting to go straight over to 12 o'clock, giving way to traffic coming from 3 o'clock, but it is all backed up on the 9 o'clock exit they want to get to so they are just parked on the roundabout in front of you)
-Pedestrians meandering in the road in car parks, sometimes 3 abreast instead of single file
-Drivers not giving way to pedestrians at zebra crossings (worst in car parks but it happens elsewhere)
-Lack of indication (most annoying at roundabouts where you are giving way to the right but they then just turn off at your exit anyway without indicating so you 'could have gone' had you known... point made earlier about waiting for them to turn is valid of course but a headsup would be nice)
-Impatient drivers tailgating and flashing others who are overtaking but not fast enough for their liking (i.e. somebody is overtaking at 80mph, car comes up behind in a huff considering it a crime for anyone to be doing less than 90). I'm not talking about people just sat in the outside lane, but genuine overtaking manouveurs
-Pushing in in queues without waiting to be let in (see lane closure thing above)