This is the Mars / Space background again but taking on board what people have said about things not looking hand-drawn enough. This is maybe a bit too basic, I'm not 100% sure. The previous effort is on the left, the new one on the right:
I'm not polling this time, but comments on which (if either) you prefer and why would be appreciated.
Remember that these are screen shots and some jaggies have crept in that won't be in the PDF version.