Hi, John.
I'd like to hit something with a broad visual interpretation this time around. Phrasikleia proposed Depth a while ago and there are many ways to approach this. Using curves and/or lines in a composition would be interesting, also. The fancy term for that is curvilinear. I like having two ideas to work with. I seem to shoot more.
So, that said, Depth and/or Curvilinear are my thoughts.
Dale