I started off college as a history major and did some recording for interviews. I found that if I set up NOS with a slightly less angle (75o, about 3-4 ft gave a nice dynamic to the recording (XY would probably work) and it gave an emphasis on one channel for each participant but still a stereo recording that had both participants in each channel. Not particularly important as the information is priceless and just as valuable transcribed (as is often the case for academic works vs. personal recordings) if not more so for posterity, after all print never goes out of style but technology in sound changes every few years. But it sounds nice for those of us who look for that kind of thing. My 0.02
edit: Did this work at time when I mainly patched shows and didn't use my own mics often, so it might be helpful to play around with mic configurations with a friend first to see what you prefer if relistening quality is very important. But it sound good to my ears.