At our ante-natal classes they showed us the epi-dural video and I walked out of that after less than a minute. If I hadn't I would have thrown up and passed out. Next week was the c-section and I got excused before it even started. She reckoned if I couldn't handle the epi-dural video there is no way I will handle the c-section video.
So, its all natural for me if possible. If I have to have a c-section, the plan is to keep tranquilizers on hand in case I panic (have a tendency to do this even when just having a tooth extracted).