It depended on type of riding, load, speeds, and weather/temps.
Lately it's been solo in -10c temps, so 27/29.
Spring/fall solo: 30/33
Summer solo: 32/35
Summer two-up touring: 36/39
And that's been everything from interstate drones to trail riding, solo and two-up, don't change the pressures. They'd work better if I did lower them for the single track, but I can't be bothered. Takes time away from riding to change it back and forth...