I am more than stupidly excited for all the new fruits and flowers. And the bushes and bamboo. And the garden shop for that matter
In fact I think I may just dedicate a whole section of the museum to the new fruits and flowers. Definitely one of my favourite things about animal crossing
For me, it's the clothing options. My favourite thing in this franchise has always been about dressing up my character, so with the changes to the torso & clothing, and the QR code feature, it makes me very excited with all the customisation possibilities.
I'm excited for the day when I won't have to be obsessive over my grass wear. I found CF much less enjoyable than it should have been because I'm constantly obsessing and worrying about my damn grass.