When I was still working as a web graphics designer, pseudo-3D elements were my favorite. I usually start by creating a basic lambert 3D in maya

Then I trace the 3D image in photoshop using the pen tool or if I'm really lazy at the moment, I'll just tweak the blending mode of a new layer on top of the 3d, and add colors.

Add some texture and value.

And Voila! you now have a 3Dish logo.