I would think quality built bunkers would be site and conditionally specific.
What direction the bunker is exposed to the biggest winds. Whether it's level, above or below the surface of the green, along with it's justification for being, implies a variety that is only formulaic when it's done properly throughout the golf course. Implying an intelligent varied design because every note is perfect. Nothing worse than predictable and repetitive placement throughout a round, or, I suppose, an architects career.