On my trip around Europe, there were many hours spent on trains, boats, planes, and buses, and thanks to my trusty DS Lite, and the homebrew app Colors (can't recommend it highly enough) I was able to use this time to doodle.
So here are the fruits of my labor in chronological order:
This was my first proper sketch using the app, and I believe I was really starting to get a feel for it towards the end, before abandoning this image.
My first speed paint with the app. I think it turned out reasonably well. Unfortunately I accidentally tapped the screen with my palm whilst drawing, and two white lines lashed their way across the image. I painted over them, but they're still visible in places.
Went for some smooth rendering on this one, and was very impressed by how well the app performed.
This is an unfinished portrait of my 5 year old cousin Amy. The likeness really isn't there, but I like the watercoloury feel.