Our son researched the interview process and decided on the previously stated advice. He went in looking professional (shaved his head the day before!
), took each interview as it came at him and he ended up enjoying the experience.
His interviews (3 of them) were scheduled for him back, to back, to back, and they were all panel interviews made up of former military personnel, staff members of the congressman/senators, and members of our community invited to participate.
In one of the interviews he was asked about which academies he was interested in and why. Our son had only considered West Point and he explained his reasons. The gentleman who asked the question shook his head and told our son he should have considered the others as well. Our son wasn't quite sure what to think of that and he may have worried about it a little.
After the process was complete, our son received and accepted his nomination to West Point. At one of the Parent Group get togethers before he left for beast, the same gentleman who told him he should have considered other academies sought out our son and shook his hand, congratulating him. He told our son that he made the comment during the interview because he is a USNA graduate and would have loved to see our son go there. He told us that it was Navy's loss! We already knew that.
Point being, take the advice of the people with the experience. Listen to their advice and go to the interviews prepared and professional. Be yourself and knock their socks off!