At work I sometimes switch the scrolling over to traditional. Others get completely thrown out and cannot grok it! 😂

Natural, but I use a touchpad.

The thing you're apparently calling "traditional" seems natural to me.

I've never really stopped and thought about it before, but as far as I can figure, my brain expects the part of the system that does or would actually touch the surface to drag the screen in a particular direction through the simple workings of physics.

On a touchscreen, it's simple - it's my finger actually touching the screen and it drags the screen around exactly as I'd expect.

With a mouse, my finger isn't the important part because it's not touching the surface (or more precisely, the mousepad that substitutes for the surface). Rather, my finger is contolling the mouse, and the underside of the mouse is touching the surface. And as far as that goes, the "traditional" way it works is correct - when I move my finger downward on the mouse wheel, the bottom side of the wheel - the part that would actually be touching the surface if it was a purely mechanical system - is moving upward, so would drag the screen upward.

So to me, that's what's natural.

I noticed this in video games rather than on-screen text scrolling. Some of them had a weapon selection, but instead had mouse-wheel-down "decrease" the weapon slot, and mouse-wheel-up "increase" it. However, the game also used the mouse wheel for other things, thus changing it to my preference had some unexpected side effect.

In any case, mouse-wheel to scroll view works because of the mouse-pointer paradigm. Move both mouse-wheel and mouse in the same direction, and the pointer is further along the content. Move them in opposite directions, and the pointer tends to hold position relative to content.