1) how willing the candidate is to do the thankless grunt work that is needed for team success
2) how likely are they to spend their time reducing the amount of gruntwork their teammates have to do
As a manager, it's important to keep your incentives aligned for team success. Sustained success happens not because a star engineer does something on their own, it comes when a team works together to unlock each other's best work. Reward grit over glam.