Ooh! Cool idea! Do you think Hibiki would like to play Animal Crossing? Mmmhmm...
I think Hibiki would definitely entertain all the villagers, neglecting her own house and the town's condition a little to do all the favors for them. And if it's for the Gamecube one, she'd especially love to hang-out on the island.
Iori gets Nookingtons, and the most expansive houses complete with marble flooring in all the rooms and fancy paintings. Fitting, for the princess!
Miki: BEDS. BEDS EVERYWHERE. NOTHING BUT BEDS. If she had the DS or Wii copy, she'd eventually convince the other girls to lend her beds (Since she'd be too lazy to earn the money to buy them herself.) so each bed should have a different sort of personality.
Yayoi would probably have that expensive candy-house theme from Gracie Grace's in the Wii game, and a full collection of all the different fruit trees.
Makoto would have the frilliest, girliest, pinkest house ever, but the HRA would keep rating it very lowly. xP
Ami and Mami, on the Gamecube game, would probably collect all the NES emulators. They'd probably also have some of the most developed towns, gamers that they are.
Yukiho couldn't play. Too many dogs! Male dogs that talk to you!