I've recently bought a 3 in 1 (Printer, Scanner & Photocopier) Canon Pixma. And immediately started scanning my PreProduction materials.
Character Sketch:

Storyboard:
Location Release:
Scene Summaries:
Shooting Schedules:
Floorplans:

The above is the basic design for the animated bits in Kiamu!!!, excerpted from the Njet-Steng explanation & demonstration scene. The basic design is...well..basic. The character is casted against a white background.
I think it looks fine but still plain somehow. So I revisit the schoolboy-paper concept and applied a lined school exercise/notebook look to it:
I think this looks better in some sense, but i still somehow preferred the wrinkles that I get from the other version, as it gives a somewhat grittier look. So i added the two elements up:
I'm liking this one, especially the depths I'm getting from it. So i took this design and played around with the colours and ended up with the one below: