After some debating, I went with New Horizons. I've only played New Leaf, Happy Home Designer, and New Horizons, so it was between any of those three (and honestly kind of hard to choose). But I went with NH, even though I've only started playing it relatively recently, because in general I like the more laid-back vibe (villagers don't leave on their own, you're not punished too badly for not playing for awhile) and the increased freedom with customization.
It has its own problems for sure, like golden tools breaking, or the one-island-per-Switch thing, and I wish we had more of the content that was in earlier titles too (though I'm still holding out hope for an eventual return of the cafรฉ
). But I think there have been some definite improvements since New Leaf, tooโNL did Blathers and Celeste serious injustice, and they've grown on me so much more with their expanded dialogue in New Horizons. I'm also
very grateful that we can see the clothes/furniture in our storage now; dressing up and decorating in New Leaf can be kind of painful when I keep going "...what does this item look like again?"
New Leaf's definitely got a lot going for it too, though, which is why I had a hard time choosing. It's my first AC game and it got me into the series to begin with, and I'm still enjoying playing now. There's a lot more to do, and there's so much beautiful furniture in New Leaf that I
adore that sadly isn't present in New Horizons at all. ;; I also like the wider variety of requests you get from your villagers. I really like Happy Home Designer too, but it's kind of hard to compare it to the mainline games. Still, like New Leaf, it's got an impressive amount of furniture variety (and unlike NL, it has ceiling furniture!!) that I think New Horizons could really use, especially with NH's increased focus on decorating and customization.