David,
Aerial views shouldn't be considered, but since most bunkers start out at least conceptually as a squiggly line on a piece of paper, they tend to be considered that way. I often had to teach the new guys on staff the problems with the squiggly shapes.
One of the biggest is that I prefer simple front edges with all the shape on the top of the bunker. Once you build a small mound in front of a bunker to sort of shape an amoeba, you simply hide parts of it, and need to raise everything else behind it the same amount. Also, most plan drawn bunkers have a narrow front to back dimension, but if you look at classic old bunkers, they aren't as narrow as they tend to get drawn. If a bunker gets a little more dimensional depth along the line of sight to the golfer, it doesn't have to rise as steeply to be seen.
That said, I have actually traced and copied some nice aerial shapes in my computer for future bunker starting shapes. Why? Well, I realize I am as prone as anyone to tend towards drawing the same bunkers, and for shapers to shape the same bunkers. I figure I can use those as starting points for some oddball shapes, varying dimensions of lobes, etc. Too many bunkers come out nearly the same, since the width of the bulldozer blade becomes the prime determinant of size. By drawing a bunker with wildly different configurations (inspired in part by those aerial photo parts) I at least get them started in a new direction.