Be yourself. "Culture fit" is very important -- not that there is a corporate culture. Every group is different, but mostly, you don't want to pretend to be something you're not only to find yourself surrounded by people who expect you to be the "other" person they interviewed.
Help answer questions real people are asking about your company. Your answers will be 100% anonymous.
The person asking the question will be notified of your answer, and it will be posted publicly. Your identity will be kept private