Be yourself. Don't be overbearing. One thing they look for is, can you work in a crew environment. Can you be assertive without being aggressive or intimidating. Can you be standardized. You will work with many different people, standardization is important. Are you stable! After many years of work pressure, will you still be sane?
Pay an interview prep place like Emerald Coast or Raven Careers to help you prep. This career will potentially be worth millions, spending some money on prep will pay off long term.