> So rotate in one direction for vertical for consistency
There is no consistency, your USB port may be on the left, right or back of your screen, what's the useful thing to standardize then? And it can jut out from a wall. And on a desktop tower, the USB port can be on the front or the back, and the user may install the machine so it is accessed from the left, the right or either.
Left/right/back of screen is still the same direction. If it's counter-clockwise from green-up, it's green-left everywhere, including walls. On anything parallel with the floor you're right - so color-code the plug.
There is no consistency, your USB port may be on the left, right or back of your screen, what's the useful thing to standardize then? And it can jut out from a wall. And on a desktop tower, the USB port can be on the front or the back, and the user may install the machine so it is accessed from the left, the right or either.