Focusing only on the #END foo markers, I find it interesting that you mention vi. Personally, I find using % to bounce between openning and closing braces much nicer than having to 1) clutter my code with countless #END foos, and 2) think about the foo to #END foo mapping when looking for the end of it.

Of course, as you mention in another post, this is all personal style. Sometimes it's unfortunate that everybody thinks their own style is the best. :)