I have noticed that my favourite and (in my opinion) best executed illustrations happen when I'm avoiding doing something else that is probably more important. Is this the case for other artists and creatives? I usually get a craving to draw and it just seems to happen. I'm not the sort of person to endlessly rehearse a drawing. I don't normally "practice" as such... If I'm in the right mood I can do an anatomical drawing of a skull in roughly an hour and a botanical drawing of one sole flower in less than 15 minutes. I'm a very fast drawer and with the majority of my ink drawings I don't sketch it out first I just dive straight in with indian ink.
I've never thought of my process as abnormal until I went to study illustration at university. Everybody seemed to keep endless reels of sketchbooks and layout plans and practises. At college I was taught to draw the basic outline of a person in under five minutes with no errors. My life drawing tutor was incredibly strict... Maybe that's why I'm an abnormal artist.