For the longest time, I was a staunch “opposite direction” (wheel goes up, page goes down) person. This was how scrolling worked when it first became a thing, it made perfect sense because it behaved the same way it would if I put a rubber wheel down on a piece of paper and spun it, like the wheels that suck a piece of paper into a printer, or pull a dollar bill into a vending machine. And once switching became an option, I would angrily switch any machine I used back to the One True Way.
BUT then one day (I guess after trackpads became the norm?) I realized I was using scroll in the “natural” direction (wheel goes up, page goes up) and I have no idea when I switched, it just happened.
—Patrick