Ever since I learned of the Mehrabian myth (saying that communication is 55% body language, 38% tonal, and 7% words), I have looked for and evaluated the source of each piece of information generally accepted as true about how people communicate. In my searching, I sought credible underpinnings to what is being taught as preferred representational systems: visual, auditory, or kinesthetic. I was not able to find that credibility.
I would not be as cynical as Roy H. Williams was in the quote below taken from his Magical Worlds of the Wizard of Ads: Tools and Techniques for Profitable Persuasion. I will say that I no longer include VAK in any training or presentation I give. (Some of the research done on the validity and reliability of VAK is cited at this linked-to Wikipedia entry.)
Williams says . . .
Sooner or later, a person standing at a whiteboard is going to tell you there are three kinds of people" "visual, auditory, and kinesthetic."
. . .
Although this tidy little theory is taught from coast to coast, you will not find a molecule of scientific evidence to support it. In fact, the whole concept is utterly incongruent with all that is currrently known about the architecture and functions of the human brain.