Many of these questions, as you can see, cannot be answered without thinking carefully or critically. As with the regular behviorial interview questions, your best strategy to answer these requires that you give anecdotal information. Think of a Situation, of Tasks, Actions, and Results. There's the STAR method again!
What types of projects (academic or otherwise) have inspired you in the past?
What are some self-directed missions that may have influenced your career direction?
Did you have a moment of epiphany when you KNEW what you wanted to be when you grew up?
How does Microsoft fit into your vision?
What are some things that excite and motivate you?
What are some examples of poorly/well-designed software? What makes the software this way and how would you change it?
(Courtesy of Wikipedia)