Five years is a long way down the road, but I know that finance will always have a grip on me. I could see myself in investment banking for the long-term, but that would have to depend on my performance and my family situation. I would definitely like to stay in financial services, using the skills I've learned and continuing to build solid and meaningful professional relationships.

NOTE: You want to demonstrate that you are committed to investment banking, but you don't want to be disingenuous by stating that banking is the only job you'll ever want to do. If you're interviewing for an analyst role, you don't need to demonstrate that you are committed to investment banking long-term; bankers are in a two-year program, and then they're out. Be sure, however, to mention that you are very excited about becoming an analyst and that you want to learn as much as possible, get as much transaction experience as possible, etc.

On the other hand, if you're interviewing for an associate position out of MBA school, you will need to demonstrate commitment to investment banking.