This type of drawing has been with me for ages. I think they are derived from my early interest in graffiti. As a teen I was fixated on lettering. Graffiti artists could add so much personal jive to their letter-types; creating phrases so complex even illegible at times. Works of graffiti were 'logos' for a personal brand of lettering. I was all about it.
I see these drawings as an extension of that process. Lately, I've been simplifying my letters, and trying to improve my scribble technique.