Cupcake and princess are nice, but I don't like how princess is lowercase so I tell them to call me Princess. What was funny was that today Mint suggested calling me princess but she was already calling me Princess, so I told her "No I don't want to be called princess, call me Princess"
The very first nickname suggested to me was "cookie" coined by Anchovy, my lazy villager.
It was just too adorable and hilariously appropriate (lazy villager suggests something cute and food related? nice) that I allowed him to call me that. Very soon after that everyone in my town wanted to call me that and it's been about two months since I started my town and game and they're still keeping it strong. There's just something so nice about being called that especially when I hear the nickname from my snooty and cranky villagers.
Not that they haven't tried calling me other stuff though! Like when the cookie moniker first spread throughout the whole town, Rory my original jock villager suggested "muscles" and I laughed so hard I let it be a thing and it sort of caught on but I stopped it because cookie is the best one. And also I don't have any muscles so it doesn't really work if I'm being honest haha!
The only other suggestion I remember getting was "Fancy Y" courtesy of Olivia, my snooty. It doesn't work for me at all but I really appreciate that she wanted to make one up for me. ♥
I've asked to be called lovely by Celia, sweetie and shmoopy by Olivia, princess by Wolfgang which spread briefly to Rory and Anchovy when it was a thing, and hunter to Rodney because I think I had a bad salon haircut and I was wearing the full Samus gear and he just would not take no as answer and insisted on calling me something so there.
Many nicknames have come and gone but cookie remains supreme. ^^ And also hunter because he does not get to join in because I dislike him. >:C