Be careful though not to say anything that would offend or be taken negatively. Your research will help you in this area. Image is often as important as content. What you look like and how you say something are just as important as what you say. The types of questions you ask and the way you ask them can make a tremendous impression on the interviewer.
Good questions require advance preparation.
Just as you plan how you would answer an interviewer's questions, write out specific questions you want to ask. Then look for opportunities to ask them during the interview. Don't ask about benefits or salary. The interview process is a two-way street whereby you and the interviewer assess each other to determine if there is an appropriate match. Maintain a conversational flow.