Muffy IMO. She's a Gothic Lolita sheep, and she looks awesome, also her house is full of Rococo furniture which I LOVE to buy when she tells me to come over to her house. She's a more or less permanent resident in my town!
None, I hate them all and I'm waiting for the day that I can torture them and they will finally admit that they were on a snack run. In-game of course.
Phoebe for me! I love her phoenix design--I actually just love phoenixes and their associated symbolism, I even have a tattoo of one on my shoulder that means a heck of a lot to me. She's also super sassy/sweet and her home is gorgeous.
Deirdre :> Sadly I don't like many of the uchi villagers and even contemplated not having one but I'm glad she stumbled upon my town when I was cycling.