This is super-interesting to me. For most of my younger years I was this type of thinker, a non-verbal thinker, but I thought I had some type of problem and I distinctly remember thinking: which type of thinking should I use? Non-verbal or verbal thinking? I realized I could do both, but leaned heavily toward non-verbal.
I can't remember the reasons but I concluded that my non-verbal thinking was not as good and pretty much forced myself to think verbally, with much effort. I'm definitely going to do some major research on this until I figure out how to get back to non-verbal thinking at will when I want to, I remember it being very natural to me and very me. Doing a quick google search I found that one of De Bono's books may be very useful to understanding/getting to non-verbal thinking, which you may want to get. I won't have time to get it until about a month later, so if anyone wants to get it and write a review I'd be pretty appreciative.
EDWARD DE BONO - ATLAS OF MANAGEMENT THINKING Amazon.co.uk: Atlas of Management Thinking: Books: Edward De Bono