DeltaBetaBaby - because to me it always looked - from the outside at least - sort of like a big, beach house - kind of a rounded, sweeping porch and just a very, casual pretty as opposed to traditional, colonial. Not that I don't love seeing pictures of the traditional, big houses- they are beautiful, but U of O is a very, casual, easy-going sort of atomsphere and as I've mentioned in other threads - non-traditional, and not far (an hour) from the beach, so it all fits for me. I just really like it. WCSweet has put pictures of it on here somewhere.
Gusteau - it's hard for me to believe that someone's first experience in Oregon would be Corvallis and they'd still come away loving it - but hey, to each his own.
Actually, I know the least about OSU's greek system, but my favorite co-worker was a Kappa Kappa Gamma there back in the day and her daughter was a DG (and now their chapter advisor, I believe).