Overly cautious cagers.
These folks piss me off. They are easily my biggest headache during my admittedly headache and hazard free mostly rural commute.
I am talking about the person who approaches you from behind with miles and miles of visibility ahead. They will slow and linger there for 5 or 10 seconds, sometimes more.
F'IN PASS ME ALREADY!!!!!!!!!!! I think to myself as I roll along on the crappy shoulder I have voluntarily taken to signify that it is indeed OK to pass me, seeing as there's no oncoming traffic for atleast a few minutes, by the looks of it.
I would prefer they buzz by me at 50 mph. That way I can ignore them more quickly as they disappear ahead of me and I can get back out into whatever appears to be the smoothest part of the lane.