"... the basic makeup of inner life varies substantially from person to person.
“My research says that there are a lot of people who don’t ever naturally form images, and then there are other people who form very florid, high-fidelity, Technicolor, moving images,” he said. Some people have inner lives dominated by speech, body sensations or emotions, he said, and yet others by “unsymbolized thinking” that can take the form of wordless questions like, “Should I have the ham sandwich or the roast beef?”
After abstaining from his own experiment for more than 30 years for fear of becoming biased, Dr. Hurlburt submitted to a single day of introspective fieldwork in late 2007. He discovered that although he had never noticed it before, most of his thoughts contained no words or images at all. Rather, they consisted of what he calls “unsymbolized thinking.”
I'm a word and images person. I'm not sure I would know how to do "unsymbolized thinking". I'll have to remember to give it a try, although it might result in me taking three hours to order a sandwich.