What single project in your portfolio do you consider the most significant?

"Over the years I have worked on some incredibly important projects that I am proud of. If I could, I would love to show you my portfolio of work. I have handpicked some of my most significant work for you to see today."

The interviewer would like to know which project you feel is the most significant in your career, so far. This could be the biggest project you worked on, the most complicated project, or one that was closest to your heart. Briefly describe why you are proud of this particular piece of work, and then be prepared to show your work.

"The most significant project in my portfolio is the project I worked on with (Client ABC). It is by far the largest project in my work history. The deadlines were tight, the details were complicated, and the budget was vast."