I started leading the heel after looking at scratch patterns.

I'm not sure that the is a difference in my shaves now since all my edges have polished bevels under the scope, but at one point it seemed to make a difference.
Of course I was a horrible honer then.

I sharpen my kitchen knives so that the scratches will point in the direction of the cut.
I found this to be a factor in sharpness when I was doing lots of skinning.
The result does seem to decrease as the size of the micro serrations shrinks.

YMMV as will your sharpening skills.