Some attributes many seek in their submissives/slaves:
Honesty - Absolute honesty at all times
Trust - Absolute trust
Willingness - A willingness to do anything that is required when when we require it, never questioning for a reason if one is not supplied
Anticipatory - The ability to foresee and act upon our needs prior to the need materialising
Adaptability - The ability to adapt to any situation as required
Eagerness - The true desire to please us in every single thought and action
Please feel free to add more attributes...