I have developed a habit of speeding on the motorway.

[Ash]

drives me mental and seems very common.

Or 2 lorries side by side that's always fun.

That's the one. Two lanes of lorries going at 60 and 61 miles per hour and one lane of cars doing 90+. Ugh.
I hate motorway driving unless it's empty. Every moment feels like a battle to stay alive (and awake) while trying, as you say, to get off it as soon as possible. Coming back from Cornwall the other week, and the M5 was getting too congested so we came off and drove through Somerset. Glorious drive past Glastonbury and lovely countryside, then back on the motorway near Swindon for the grind back into town.