Many people speak of making decisions by instinct, or of "gut feelings." Without getting into the conversation of nature versus nurture, human instinct is a peculiar thing, something in which many people place a great amount of faith, but most people don't even fully understand the difference between instinct and intuition. Instinct is something that is fundamental to a creature's biological makeup, while intuition is the result of the brain's complexity leading to the synthesis of a solution without presenting in detail all of the steps it took to reach that result.
In theory, a sufficient understanding of genetics, and the technology to implement that understanding, could lead to the ability to create custom people. CRISPR-Cas9 has delivered significant successes in genetic engineering, including human experiments in China in which a scientist used the technology to alter human embryos to remove a disease-causing gene sequence.