My daily commute is 300Km round trip, freeway and highway. This thread describes my life.
I call drivers parked in the left lane 'pylons' or 'NPCs'. The most common of these degenerates are suburban boomers in Subaru Outbacks. I have a finely tuned technique based on faster driver's universal hatred of these people.
The WORST, are the "professional" B-train drivers who decide that they need to pass one of their highly skilled colleagues, so they pull into the left lane going up a hill, 10 under the posted limit, regardless of what's approaching immediately in their left mirror, then prove they haven't the operator's skill required to make their road train express go any faster. Minutes and Kms later they're finally able to eke out the win and get back over, most of the time. Once in a while they actually drop back into their prior position.
Bad enough when they do this on prairie four lane highways, but the real champs do it in the rare passing lanes on two lanes in the mountains in AB and BC.