I think you did a good job with the background. But if you look at it from a distance, the backgroud is more prominent than the subject of the illustration. No comment on your drawings since you are rather proficient in this aspect.
no, i get what you mean. composition is definitely not my strongest suit, and i tend to color everything with very flat even values early on. that hurts the process i think, i'm trying nowadays to predict the lighting it will be in the final product so things are highlighted properly.
also though, i am uploading these pictures without the inclusion of Harry's vignettes, he will often put soft black halos around the cartoon to draw focus to the center as well as other embellishments- if people are wondering if these don't look as good as the cartoon :X
Oh, I'm in desperate need of some meat now...