Passion?

Tonight at our small group this question came up: "What is your passion?"  I have to be honest, I sort of hate this question.  Only because I never feel like I have a good answer.  When other people answer this question I usually think "yes!  I can totally see that. That is totally you!"  But for some reason when I look at myself I feel like a deer in the headlights.

I looked up the word "Passion" on dictionary.com  Here's the definition it gives:

Passion: any powerful or emotional feeling; strong amorous feeling or desire

I must say I was very disappointed by this definition.  I mean, sometimes I have a strong desire for chocolate, but it's not my passion.  (At least I don't think it is)  The synonyms they gave were a much better fit: fervor, zeal, ardor.

Even still, I don't have an answer.  I loved what one of my girlfriends said.  "It's changing all the time."  Now that I can relate to.

What is your passion?