"Tell me about a time you set difficult goals. What did you do to achieve them? Walk me through the process and purpose."
"Tell me about the relationships you've had with the people you've worked with. How would you describe the best ones? The worst?"
"What single project or task would you consider your most significant career accomplishment to date? Walk me through the plan, how you managed it, how you measured its success, and what the biggest mistakes you made were."