1- Random doodles:
2- concept art:
3- Some more concept art:
4- Fucking about with cheap-ass felt tip pens:
5- Fucking about with my tablet:
6- Doodles again:
7- And again:
8- And again (By the way, the robot is referring to the other, bigger robot on the same page):
9- Some more doodles, most of which I'm not that happy with:
10- And the latest:
These were posted in chronological order, from the oldest to the newest ones to show any improvements on my part. I numbered them for you so it's easier to comment on an individual one without having to quote a titanic sheet of sketches.