Sorry this is the Comment and Crit board, so I just pointed out what I could see. If you didn't want any Crits there are a lot of other places to post your art.
I agree there is much goodness in simplicity.
If you wanted the drawing to look more sketched or draughtsman-like it would help if you used a pencil-like texture on the lines or maybe a softer/less digitally stale method of colouring. Just a suggestion.