I really have improved since I first came here.
-Drawing structure: Smoother lines and more solid bodies.
-Shading: I can actually determine where the light source is.
-Coloring: Ground and characters don't look too bright compared to the night sky.
My old pic: [link]
The new and improved pic: [link]
Oh, and if you want a sample of how I used to draw digital-wise, look at this: [link]
That is total crap compared to what I can do now.