Drawing freaky head-shapes is easy, but figuring out how to draw bodies that fit the very deformed faces is challenging. There is a fine line to walk, lean too much in one direction and the bodies are too cartoony, lean too much in the other direction and it looks too realistic.
I have a tendency to make things more "on model" the more I draw that thing, it's a struggle for me to keep things loose and expressive.
Reading: Dune by Frank Herbert
Listening to: Nick Cave & The Bad Seeds - Push The Sky Away
Playing: Fallout 3: New Vegas