Look first for character. Are they people who want to do the right thing, not only in real estate but in other areas of their lives? Are they people who honor their commitments, or have they had a long string of various jobs, moves, marriages and real estate is just the latest? If they aren't employees, but people who you want to partner with, you have the right to ask them anything you want. If you intend to contract with them in any way, realize that the marriage is easy; it's the divorce that is hard and needs to be thoroughly covered in your agreement.
Before real estate, I managed a medical practice. Group dynamics was the hardest part of the job! Our best efforts to lay out our expectations and see if they matched the other members of the group were the hardest with young members of the group who hadn't yet figured out that there's more to life than the money. Consider some seasoned people, even if they are young in real estate.
That's my two cents worth!