Advanced Extrusion with Shatter
This is a fairly simple technique often done poorly. The trick to making the 3D extrusion look as good as possible is in the way you use a custom shape layer and the way you assign textures to the extrusion.
For this example I am using AE's comp camera and a point light to view the extrusion layer. I've added a different color to the extruded edges and also added the background color to the back of the extrusion. A 3D duplicate of the text layer used as a custom shape is set to cast shadows only and the material options of Shatter have been adjusted.