Considering my normal feelings towards most people, breathing is fairly high on the list.
Not going with the flow of traffic, no turn signals, not paying attention to the fact that there are other vehicles on the road, yakking on the phone (I don’t mind Bluetooth/handsfree though; just the lack of free hands to actually operate the vehicle.) , tailgating, poor lane discipline, being cut off, not being let into a lane even if you’ve been signalling for >½ a mile, driving a stick-shift with no clue how to use a clutch….
It’s easier to just shorten the list to “Breathing”