This is what the back of these quilts would look like … if you did the Log Cabin blocks in the usual way for the other side.
Some of the design could be appliqued as well.
However, these could all be reversible whole cloth quilts.
That is the way I would make them, so there was no right or wrong side.
However, I might be tempted to make the patchwork top and add some applique just for fun.
I think I like the last one best, possibly because it is based on my favourite Log Cabin layout.