EagarBeez - I love that you used an Excel spreadsheet to draw the bargello layout. :thumbup:
Here's a Bargello version made by another member here (smockingRN):
http://www.quiltingboard.com/t-80122-1.htm
You can see how changing some of the squares to rectangles changes the flow of the curve to something other than a zig-zag. Also, if you changed the square to be a rectangle (horizontal), the curve would/could also flow across the quilt.
It's a really elegant design, and the color selection (with the value changes) is lovely.