A concept that can help explain (and darer I say it, create) interest in images? Layering.
This means “dividing your image into visioble layers. You can do this by blurring parts of the image that are separate from the parts you want to draw attention to – i.e. by selective use of narrow depth of field.
Start with a fairly mundane image:
Now add a foreground layer:
We could have blurred the foreground – often, that works too. The foreground becomes a frame.
And now, one more: even more extreme – get closer to a larger object:
And finally, an image with three layers: skeleton 1, skeleton 2, and background:
Nice eh? And easy to do. Get close, select a large aperture, focus using one focus point.