I think my favourite uchis would be Canberra, Muffy, Fuchsia, Tammy, Flo, and Agnes. I wasn't actually expecting to like the first two, but after having them both in my town they quickly became some of my favourites.
My favourite uchis would be Fuchsia and Katt. I found Katt scary as heck when I first saw her, but she grew on me and now I really love her as a villager. She has something about her that I find really charming. Fuchsia was an uchi I always wanted to try, but I felt like i'd end up hating. I never had the patience to keep her for too long, as her house was always in an awful place. Finally when her house wasn't in an awful place I got to know her, and she's quite an awesome villager imo.
Definitely Mira, Muffy and Deirdre. Sadly, at the moment I have Paula and she plunked her house right beside my bridge and will not moveeeee
I think the uchi type got pretty shafted on cute characters, a lot of them are just really unappealing..
(I also kind of like Flo but just for the expressions she makes when you make her shocked or angry)