My brain works the same as FLJs, I think in Imperial because that was what I was taught at school and at college.
Most of my formative work as an engineer took place in the 60s and 70s, in Imperial. I've only had to work with Metric more recently and even then I had to go back to Imperial depending what I was working on. Upgrading a ginormous test system at Airbus Filton that was originally built in 1945 (!) was totally useless if I worked in Metric, trying to find a hydraulic seal kit that fitted a piston that was 1219.2 mm inner diameter was a waste of time because it was designed to be four
FEET in diameter.
I have an intrinsic feel for what 100 ft ilbs of torque are, I have a gut feeling for 3000 psi of pressure, but not 207 bar, that's the just the way I was taught.
In a generation's time it won't be a problem because all of us educated this way will have moved on to higher things, then the Metric Lobby can have things all their own way. In the meanwhile, whether they like it or not, we have to live in a dual standard world.
Mind you, if that Airbus test system is still working then someone will have to find a 1219.2 mm seal when it springs a leak............