Mmm. Thorns. I have to admit, the more I see and read about it the more I want it badly. I love the amount of detail and dimension between the characters in what did you say, a five to ten minute sketch? Simply great work. The colors are fantabulous!
You've officially convinced me to check out this Thorns place. Or at the very least create a fully fledged original character! Haha. These are really fabulous even for quickies they show how good you are at creating different face structures and emotions. (:
True, I guess I'm just looking at all the hair definition - definition with the eyes and bits of shading. I'd definitely have to play around with a CG in order to get it to look like that, couldn't get it to look like that in 5 minutes. I guess it just takes practice though.
From the default menu I use 46 spatter, a brush that's very good with blending and can create those "hair strands" and the fading effect. It's great for getting lots of paint on the canvas quickly and then filling in little details.