What annoys me is if you try to do the right thing and stay in the most left lane you can, with the cruise control set so youre at a constant, predictable speed, other drivers do not anticipate that you are going to need to pull out to get around slow traffic and will happily pass you without any consideration thus boxing you in and causing you to cancel the CC. This I believe is one of the reasons people hog the middle lane because they can pretty much set the cruisecontrol and stay there. But doesn't bother me as I drive an Audi and ride a BMW and both are allergic to anything other than "the fast lane" lol