1.4 Diversity of Personality
"To make learning mathematics interesting" cannot be "to serve what all of the learners think interesting".
"What all of the learners think interesting" is impossible in the reason of the diversity of personality. And, anyway, we do not wish for such a thing. That concept only scare us.
Someone like/dislike close reasoning, someone like/dislike such games as flashes of genious are required, someone like/dislike visual expressions and someone like/dislike simple texts. There is no right and wrong. All should be present. But, we should not try to incorporate all into a thing. Those into which every liking of people is incorporated is not a food anymore.