I 100% agree with the OP – my driving style is consistently cautious in town and trying to get a move on out of town, but other drivers do pigeonhole you by what car you’re in and behave differently.
There are a couple of cars that stick in my mind for this – a burgundy Citroen ZX and Mk2 Golf GTIs. The ZX was basically the kind of car that tends to be bought by people who aren’t that interested in driving – you got constant tailgating etc. They are basically Peugeot 306s and can get a move on down a twisty road.
The other is MK2 Golf GTIs. If you get a MK2 Golf GTI within 100 yards of a middle aged man some switch in the back of his brain gets flipped and he WILL try and race you. Regardless of the fact that he’s driving a VW people carrier and was previously quite happy doing 56mph in lane 1 of the motorway, he will suddenly chase you down and sit 5 foot off your rear bumper…
As for people driving like complete gibbons, the best you can do is try and give them room and get around them. Even the little old dears driving a Jazz down the M1 at 60mph who decide they can pull out to overtake that truck without using any of their mirrors… 😈