tbh i was so young when i played games like wild world and city folk so i barely remember those, so maybe for me my happiest moment in wild world would be completing the job at nooks lol
in new leaf i managed to complete all the gracie and sanrio sets so my house was super jazzy, couldn't say the same for my town though
and new horizons it would be everything i've done, i've completed my island, house and got 5 stars and i'm so proud of myself for that ♡
i've also got all the villagers i wanted so that's amazing too aha ☆
New Leaf: Getting the last fish in my encyclopedia. I believe it was a King Salmon.
New Horizons: Getting Gruff while island hopping at one point. He was my villager in New Leaf so meeting him again brought a smile to my face! Also, my stomach wasn't feeling good while I was island hopping so as soon as I saw Gruff, I immediately got better hehehe.
Population Growing: Paying off my whole debt~ Kinda cheated back then because my cousins/aunt told me the code to enter for the money lmao but hey, I still got my house paid. I also remember winning a raffle back then too.
Wild World: I honestly don't remember much of,,
City Folk: Seeing Phineas and getting a balloon or bubbles from him <3
New Leaf: Getting the Wisteria Trellis, it was my favorite PWP.
New Horizons: I'm almost finished with the fossil section of my museum ;m; I have one more fossil to go!! I've never completed it in any of the other games (any of the museum tbh) + I want to complete it myself. I'm so excited~
I recently bought AC for Gamecube but I haven’t played enough of it yet.
It’s hard to say with Wild World for me since I was pretty young and had no idea how to properly save bells and never paid off my loan. I’d say getting some villager pics of my favorite villagers.
City folk and New Leaf were completing the Museum and finishing all home loans. New Leaf was also the first game I ever bought a system specifically for and I didn’t get the game until it was a few years old and didn’t really trade online that much.
New Horizons is definitely just finding my current map that I absolutely love and having all of my permanent villagers. I still haven’t completed the fossils yet because RNG hates me, but I’ve caught all the fish and bugs available so far for the Northern Hemisphere.