This qustion is designed to discover how motivated you are to the industry; to test how much research you did on the company (taking an interest in them), and if you are truly a fit for the position.
On television today, I heard the perfect example of the answer to this question, so I would like to repeat it here.
In an interview on TV 1 in NYC, the new Director of the MET answered that question in this way:
I have worked here as a young man as an usher; I am thrilled with the Met and what it has to over. I absolutely love Operat. It is the perfect blend of all that the performing arts have to offer: music, theater, acting, dance......" He loves the Met, it brings to gether all of these elements and Opera. It is the best the world has to offer. I love this position, and it is my dream, what I have loved doing all my life.
In this statement, he expressses:
Now perhaps you won't Absolutely Love your work or the place, but you might like it, and be intreged by it, and want to lean more about it.