There’s a bit of a popularity contest running right now between the registries. (And no, I haven’t peeked.) Dillard’s is single handedly destroying the competition, as it seems that most people thus far greatly prefer shopping at Dillard’s over Williams-Sonoma or Crate and Barrel.
My explanation for that? It’s a generational thing. People in my parents’ generation much prefer to shop at traditional department stores, whereas our friends would be much more likely to go to Crate and Barrel.
And popularity items? China wins, hands down. Confirming the observation by Mr. Dahlia’s mom and her dear friend, people just love giving a 5 piece place setting. (Maybe it helps that our china pattern is priced at the totally-reasonable-for-china price at $70/place setting. But it’s so pretty)

Gratuitous china picture from here.
What registry have you found to be the most popular?
Well, so far Target wins over BBB but that’s because it’s cheaper…