My schoolboy doodling habit faded sometime ago – not the least because of my being caught up in the digital revolution. It’s much easier to scrawl absent-mindedly on what ever surface is available if you have a pen in hand rather than an android.
The inner censor, well trained by censorious school masters/mistresses, also inhibited what might have been a very creative trait, and this TED talk seems to bear me out.
So doodlers of the world unite! There are many possibilities out there.