If want to really get to know a person, see who their friends are.

A few notes and thoughts. Are you married, single? What are your hobbies, and what is your greatest learning from them? Is your energy level greater outside of work? What excites you about life? What are your most meaningful activities? What movies have you recently seen / books read? What is your most valuable posession? What is your comfort level in exploring your feelings and self-awareness?