A two-part question. Hot diggity!
Let's see now, the Set Registry. Okay, for me it's its sleek, clean, modern look and ease of access. It would take more than a lifetime of perusing each and every one of its delectable offerings. You can tell a great deal about a person by what he collects, and the NGC SET REGISTRY tells no lies and holds nothing back.
As to the NGC collecting community, no finer or more diverse (and occasionally, divisive π) group of people have ever been assembled anywhere at one time and in one place, as here. One thing I have come to recognize, acknowledge, and accept is the likelihood that there may very well be 150 years of numismatic experience at play amongst members, and those not similarly endowed ought to tread lightly, be appropriately tentative in their responses and deferential in their posture, as circumstances dictate. One big and, at times, captivating learning experience where one never knows whom he will stumble into nor what treasures they may bear π». As I very often have been "heard" to exclaim, I [truly] love this place! π