A word with many different meanings. As soon as I think of the word passion I think of the long-standing collision between passion and work, and the usual, inevitable disparity between the two. The battle between wanting to get paid to do what you're passionate about, and what will pay the bills. I wrote an article on the dilemma here, so I won't repeat myself.
Instead, I will link you to a review I wrote today, because writing is my 'passion' and being occasionally lazy is my prerogative.