Genji, Coco, O'Hare, Claude pretty much. I used to like Mira but I had her for too long and had to boot her up. Why is the uchi personality so insulting lol
I seriously can't narrow it down, because the bunnies are my favorite villager species and I effing love buns IRL, so yeah.
But Ruby and Genji are particularly special to me because their designs combined remind me of my Bun Bun (who my memorial town was made for), and Dotty because she's obviously modeled after a Dutch rabbit. And Dutchies are freaking ADORABLE.
I'm going to be cheap this time and say that my favorite Rabbit villager is a tie between Coco and Tiffany.
Coco has one of my favorite designs of any villager in the series because of her gyroid-like appearance, since the gyroids are themselves inspired by haniwa statues which are old Japanese funerary statues. Combine that with how some people seem to be uncomfortable with and creeped out by her design and you have a perfect villager if I've ever seen one for a horror-themed town, which my main town is.
Tiffany, meanwhile, is in my mind my (other) mayor's assistant or partner because the town she is in is supposed to be a circus/magic show town and I think she'd be a good assistant due to the old magician's trick of pulling a rabbit out of a hat. I also just overall like her design, her Snooty personality, and the interior design of her house.
Honorable mentions to O'Hare for his hat and to Bunnie and Claude due to GameCube nostalgia and making me think of an old friend.