You're pretty good. Btw, in response to your description, you find the "roughness" desirable because it alludes to detail which isn't there. The mind perceives blur on objects as a material attribute, it doesn't think an object actually looks like that. And because the detail is easy to perceive, it allows the viewer to abstract away at more general ideas about the world inside the picture. Actually, the same concept applies to a lot of other things, as well.
its interesting how his characterization seems a lot less malicious in BBRofOZ than it does in this picture. i'm glad you went with the more laid-back, introverted personality. it lets him be kind of a common-sense foil to dolly's blithe optimism
oh and sorry about taking so long draw the witches I keep geting stuck on some thing with each witch TnT and it dosn't help that my uncle's dog chewed my table pen to the point of no return :'C so I just want to say sorry it will be a long a wait but im still coloring your line art it's very complex and I think I got her har color wrong :c but I can color what's left with a mouse thou