This was an interesting read for me.
How to identify people who are passionate about their jobs. Don't ask employees to be passionate about the company!
I think the last 4 points are very important, and probably you can use in your interviews to filter people who are not passionate about their jobs.
The simple 4-question test to see if someone has a passion for their work:
posted by 88Pro / Friday, March 02, 2007
* When was the last time you read a trade/professional journal or book related to your work? (can substitute "attended an industry conference or took a course")
* Name at least two of the key people in your field.
* If you had to, would you spend your own money to buy tools or other materials that would improve the quality of your work?
* If you did not do this for work, would you still do it (or something related to it) as a hobby?