I have a hard time sticking to a sketchbook, especially fancy ones like moleskines (partially because the name freaks me out), so I bought an especially crappy one and I'm actually sticking with it. Here are a few pages from it.
One of my favorite things to draw are moons. The man in the moon, specifically. This picture is a combination of watercolor and digital (or "the computer" as many old fogeys I know say), which is different for me, but I think I like the collage-y effect.