What do you do?

When you love something. Absolutely love it. Don't think you really want to DO it for a job, but you want to do it better, so you go to school for it. Aaaaand you get pressured into taking the certification exam because, why not? You went to school for it. Aaaaand you get pressured into getting a job in the field because, why not? You went to school and took the test and got the license for it. And then you get a job! Who would have thunk? And you like what you do, you like your co-workers, your boss, the atmosphere, the people you help, the money...

but you're standing next to a client one day and you suddenly realize... "I don't like my job"?