I remember a professor in a business class once stating that businesses (and professionals) are notoriously poor in assessing the core value that they provide to their customers.

So what is the core value that a Domina provides? The reason that makes you go back for repeat sessions?

To me, it's not the skills, the tools, the dungeon, the looks...
Yes, there are some minimum requirements, particularly in skills, but all this fades away compared to my main criteria:
The personality.

What qualities are others looking for?