After analyzing this image for awhile, I concluded that it's a very "forceful" image. First the ominous clouds lend some excitement to the mood, as do the contrasting components of the tranquil lake and boats against the stormy sky. There's also a circular motion implied in the scene by the lines of the dock, horizon, clouds, and shoreline. No, none of this stuff goes through my head when I'm composing. Thankfully, it's all much more intuitive and spontaneous than that!