When I did traditional artwork more frequently I used to do this thing where I would draw an image and fill in the background with rambling, very small text. This isn't the smallest I've ever gotten the text but it's the most recent one I've done (and from several months ago.)
Drawn with (bic?) pen on sketchbook paper.
Link
Blauen
It looks like they're about to fight, or have an intense inter-species debate! Either way it looks amazing. <3