What did we do?
Let's see.
In NL, we had Tortimer island, where it was always summer, and only cost $1000 bells a trip to get there via Kapp'n's boat, and it had an amazing beetle spawn rate (and a drop box that held quite a few beetles and sharks etc, you could pick up at the drop box back in your town), and a shop with exclusive items including the silver axe that allowed us to make stumps with awesome patterns, as well as the tour games that were awesome and won you medals to spend in the island store, plus you could gather fruit, flora and fauna that wasn't available in your town.
Then we had Main Street, or Nookingtons in Wild World, but Main Street had the Emporium, that housed Leif, and Gracie as well as the many items, including fortune cookies with nintendo items, that could keep you collecting for YEARS, and they were unique, as were the MANY furniture sets, that could be customized at Re-Tail - another awesome feature.
I really miss the rococo set.
Gracie had her unique furniture as well, like sweets and gorgeous sets.
We had Katrina that could let you know if you were going to have a lucky day.
We had Club LOL and Dr Shrunk with his joke book, instead of this impersonal reactions UI.
There was the museum shop, and the four rooms you could rent to what you wanted with.
There was Harvey's Campground that had NPC's arrive each day in their RV's with unique items to buy with meow coupons you got from completing Isabelle's daily tasks, or by beating levels of Desert Island Escape and the other mini game you could play on the in game DS item.
There were over 70 amiibo cards and figures you could scan with Wisp each day, to get even MORE unique items including so many food items, from each of the amiibo's respective RV's.
You could also feed the birds with Harvey.
We had house styles such as modern, and zen castle, and so many awesome exteriors and mail boxes as well.
We had a full sized mansion, and with a plethora of items that could literally take years to get, we had no trouble filling or theming it.
We had special fruit that could give us dead trees.
We had some great PWP's like the windmill, statue fountain, zen bell etc.
There was a ton of awesome DLC, and the holidays had furniture sets.
We had Brewster who you could work for to get special cafe items and gyroids from.
We had the post office, with Pete, Pelly and Phyllis, not an impersonal card stand.
We had the HHD giant furniture too, and the mini dinosaurs Cyrus could make.
We had Phineas and the badges.
We had a more meaningful relationship with villagers.
There is a heap more, this was just off the top of my head!
Most importantly - we had FUN.