@ Brandlin
Its not that difficult once you have a pen/tablet. Well like all art form you have to have a creative side to begin with but actually drawing on the pc is no different to drawing with pencil and paper. Saying that I find digital much easier to vent my madness. It also means no scanning of sketches.
These things are totally from my own head with a bit Twilight influence. I have a few of Mike's sketches but nothing that hasn't been seen publically really so I wouldnt want to guess at what is canon.
Random doodles is all they are really and if I like one enough it may be puttified. If Mike likes one enough it may even be tinnified.
@Gremlin
I basically start with a very rough sketch. If I like it then I will add some colour with airbrush. Usually a base colour then some shading. Then I will put some highlights on with a lighter shade. Im very erratic tbh.
The first 2 were done with a free program called Smoothdraw. Pretty basic but good for free as it has pressure support. Bird was done with Alias Sketchbook and its much nicer to use. I have Painter 11 too but thats getting a bit serious really. I like Sketchbook as its smooth and simple.
BTW the Birdy is usually found following alongside Baruk picking off parasites. Been known to nip the fingers of curious Jenta too.