This is a beautiful thread.
For me, of course there is that compulsive side to drawing which just appears to be inherent, like a direct translation of your inner life (conscious or subconscious) onto a surface. These drawings, for me, tend to be rather abstract.
But then, and that for me is the case with the work I create for dearpumpernickel, there is, apart from the pleasure and natural drive, a more rational aspect to it - it is simply something that I can do very well, and that in return gives pleasure.
But then, I suppose, these are connected strongly, as, hadn't I done it so much from early childhood on, I would not be able to do it well now!