Yes, you read that right, depth. There are lots of ways to describe the various moments of a plot as it develops, but I think in images, and when I think of plot, I see it in spatial terms regarding the depths of life it plumbs at different moments along the way.

To me, there are shallow days and deep days. Shallow days are those that tick on along in ordinary moments, almost on autopilot, never delving below the surface [...]