I personally can't get enough and I have to admit the other two were presents from the nearest and dearest who know my obsessions! Can't possibly hurt them by turning them down
I have two copies, a digital and a physical. Both are themed. : D
My main town is my Fairy Tail town where I play as a member of Fairy Tail; I have Mira, Lucy (soon), Wendy, Julian (a member of Blue Pegasus), Drago (a Dragon), and some Exceeds (Kabuki and Olivia). I'm probably building Natsu and Grey and Juvia's houses. Maybe also Erza's house. There isn't a coherent theme in regards to PWPs and no tiled paths. I do whatever I want. In Makarov's words, "Follow the path you believe in! That's what it means to be a Fairy Tail wizard!"
My secondary town I play as Ultear, the wizard with the Arc of Time magic. In this town, everything is transient. Villagers come and go, flowers sprout and get trampled, seasons move back and forth. I do most of my buying and selling in this town and host giveaways. Ultear uses whatever means necessary to get to her goal: happiness.
I'm actually kind of considering getting a third copy, another physical cartridge. If I can find one selling for cheap, say $20, I'd be okay with dropping the money for it. Not sure what theme it would have. o: