This question will help you understand how the freelancer works and how you can help the freelancer excel on your project. Pay attention to what the freelancer liked about the project and the style of working. If you can mimic the working environment and add the same sensibility or creativity to your own project, then you are more likely to receive the freelancer's best work.

To follow up, ask the freelancer what they might have changed if they were given more time or if they were able to revisit the project? It is always interesting to see what a freelancer might have done differently on a project whose outcome they already love.