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Hubert, this is just the scientific approach. It is natural to try to come up with some reasonable framework in which to work. At any rate, I think these discussions share interesting opinions on whether variant X is more or less chesslike than variant Y, and why. As to whether it's a common personality trait, I guess it's just a matter of whether people are more left or right-brained. I would expect to find some people of either type in more or less any hobby/occupation.