I've heard it called Values, Attributes and Skills. Skills are easy to teach and matter, but very little. They matter a lot in short term consultants, not in employees you hope to keep. Even if they have the skills that you want they will soon be outdated.
Attributes or Aptitude (similar ways to look at the "A") are not easy to change but can be changed with effort over time. Finding someone with the "A"s that you need is important or at least getting someone who is close. Anyone with the right "A" will be able to acquire the skills necessary quite easily and will be able to keep doing so as the needed skills change over time.
But the most important aspect is Values and these, effectively, cannot change. Finding someone whose values match those of your organization is of the utmost importance. Without these you will have fundamental conflicts and incompatibilities that will make the relationship untenable.