People often ask me if I'm 'building time.' It's their way of saying, "You seem to work incredibly hard at a lousy job, there must be some purpose to this." Or maybe they've just heard the expression and think it might apply, because they also ask me if I have "gone solo," which clearly indicates that they haven't a clue what that means. My family waits for me to become a "real" commercial pilot and seem to reassure themsleves that I am now building time in order to fly "commercial" airplanes. Every airplane I fly is commercially registered.
I rarely think of a job as 'building time'. I don't think I have spent one minute flying an airplane while thinking "I'm building time." I fly airplanes to fly airplanes. I apply for other jobs, but not for their time building attributes. I'm trying for the opportunity to fly bigger, faster, more complex airplanes, and make more money doing it.
Am I building time? Yes, ma'am, I am accumulating flight time in my logbook, but that is only a side effect of what I am primarily doing: providing you with a safe and enjoyable flight. And when they ask me solicitously if I might like to be a "commercial pilot" one day, I tell them I used to be one, but I have since upgraded my commercial pilot licence to an airline transport one. That usually confuses them into silence long enough for me to get a taxi clearance.