I suppose for me it's always about the gaps. Left + Right? I
   focus on the +. Or the gap. Well, all three at the same time.
   I'm rarely unaware of the gap inbetween This and That... or
   "This or That", or "This sometimes That". Is it a space? Is it
   glue? What's at the boundary? If i see the edge of a building,
   it's the edge of the building, the air, and the barrier
   inbetween the two (the paint or layer of dust... or the unique
   wind sheer across the edge of building that's different from the
   surrounding air... or the air getting just under the paint
   eventually causing it to lift off and fly away. It's fractal I
   guess. Annoying at times. I see something constructed, I go
   straight for where the pieces join. Screw? Glue? How well does
   it hold together? What will eventually cause the pieces to fall
   apart or fuse together? Where's the weak spot? Stuff like that.
   Sometimes I can't get my mind off of the weak spot. I usually
   HAVE to but I'm always aware of it.