Here's a really trivial one. But I thought you'd like it.
Hover over number field. Roll mouse. It changes number incrementally, one at a time.
Cute extra effect: Hold Shift and it moves 10 at a time. And hold Ctrl and it moves 0.1 at a time.
But... the Ctrl tweak only works on left Ctrl. Not right Ctrl.
On Win10. Microsoft Natural 4000 keyboard.
Not losing sleep about this one.