The interview feedback section of this site has answer options along the lines of, "What impressed you positively about this school?" so I would say to look there. I would give you directions to the page, but honestly, just google "SDN interview feedback" and you'll be golden.
I interviewed like 3 times, the most recent being 2011, so it's all a little hazy by now.
Heck, even touring undergrads, food matters. Ironically, my chosen undergrad is the only one that didn't feed me. But still, I remember each school that gave me noms. I remember them fondly.