Here's mine:

I have been using an amalgam custom 2.71 build (Sensei Format/Zero Brush, Moarz Paint, and my own custom implementations) with original Pie Menus, and 2.72's BI real-time Render (via SF).

I use a slightly modified Hexagon Theme (colors easy on my tired eyes).  If you click on the images you can see my custom UI mods (within the BF UI structure).  One image is the default layout, and the other is full-screen (with Pie Menu pop-up). * In post below *

I like the original Pie Menu compared to the new 2.72 version, which I use in a test-build.

Blender is, indeed, a highly customizable piece of software.  Even above the default, basic customizing.