I think the term "passion" has been abused a lot to mean being excited and loudly proclaiming "I am so passionate. I love it.". I am not likely that and I dont expect to be like that. With passion I mean the desire to learn and do a good job just because it makes life more interesting. I work around 40 hours a week and I try to make this time as interesting and enjoyable as possible. To me that means to do a good job and improve as much as possible. Once I am on my way home I don't think about work anymore.