In the two examples I used the shadows to form a frame around the subject. I asked a friend who was hiking ahead of me to stop in the light, so i could show scale as well as shape in the photo. In the other example, late day light, or lack of, in the canyon, gave me an opportunity to play with the abstract forms of dark, light, blue sky, and contrail too. Try it. The late afternoon light and short days gives us lots of chances to practice. Meter for detail in the highlight and underexpose, that will give you deep, dark, shadows and you can always choose to “open up” using the fill light or shadow fulchrum in Lightroom if you want more detail visible.