Honestly, it depends on what type of personality the defense counsel has. Ask your own attorney, he or she has probably either dealt with the other attorney before or at least knows something about his or her reputation.
It's not supposed to be anything hostile, it's just supposed to be a fact-finding mission. Answer clearly and concisely, and do not offer any more information in any answer than what they ask for. Your attorney should prepare you for this ahead of time.
you'll be sitting in a room with your lawyer and probably a few defense lawyers and a stenographer.
The defense lawyers will basically ask you questions in a way as to get you to admit something that is bad for your case. Especially questions about the extent of your injuries or how the accident occurred.
Your best bet is to keep your answers very simple and short. Don't answer anything that wasn't asked, ie when asked if the weather outside is nice don't answer that it is 32* and snowing, the correct answer is either yes or no
also take a long deep breath before every single question...it gives your attorney a chance to object and it gives you time to think about an answer so you don't get screwed up
remember anything you say can be used against you, feel free to say "I don't remember" or "I don't understand the question" or "I answered that already"