My favorite of the cat villagers is Punchy! Honorable mentions to Ankha, Bob, Katt, Kiki, and Olivia
My thoughts on each of the cat villagers:
Ankha: She looks really cool. She has one of my favorite designs. I love the Egyptian influence in her appearance.
Bob: I just love his very cat-like expression. And his purple coloring and spotted pattern in nice as well.
Felicity: She's cute. She has a very neat and prim appearance. Cute cream fur color with a little pink blush on her cheeks.
Kabuki: He's cool, and I like the concept, but he doesn't really fit my style.
Katt: I actually didn't like her much at first, but she really grew on me. I feel like the sisterly personality really matches her appearance, and I like her unique facial features/expression. And the blue in her ears goes well with her fur color.
Kid Cat: I'm not the biggest fan of the superhero villagers, but he's probably my favorite out of them. I love his blue and white coloring. It's mainly the helmets the superhero villagers have that I don't like.
Kiki: I love Kiki's Delivery Service. I watched it a lot as a child, and it's still one of my favorite Ghibli movies. So given that she's a clear reference to that movie and the cat, Jiji, from it, it's no surprise that I like her.
Kitty: She's fine, but she doesn't really stand out to me that much.
Lolly: I guess her eyes are meant to be swirly like lollipops, but they've always looked like single quotation marks to me. Aside from the quotation mark eyes, I do like her mouth, coloring, and striped pattern.
Merry: Very cute. I like her coloring and her little double chin.
Mitzi: I like her point coloring, like a Siamese cat. The only thing I'm not a fan of is her eyes.
Moe: Not a big fan of the huge triangular eyes with the rectangular pupils. I do like his coloring and pattern though.
Monique: I don't really like the lack of sclera combined with the eyeshadow. I also don't really like that she has eyelashes.
Olivia: Like Mitzi, she seems to be based on a Siamese/point/colored cat, but I like Olivia a lot more. I like that her point coloring isn't symmetrical on her legs. Her eyelashes and the hint of eyeshadow are nice as well.
Punchy: My favorite cat villagers. I love his sleepy eyes, his whiskers, and typical cat mouth :3.
Purrl: She's cute. The only thing that puts me off a bit is that her eyelashes are only on the bottom of her eyes. I love calico cats though.
Raymond: He's cool. I like that he has heterochromia, and I like his downturned mouth.
Rosie: She's a cutie. Nice fur color with a happy cat face, but she doesn't stand out to me for some reason.
Rudy: I can appreciated the Rudolph reference, but I don't know if I really like the nose on him. He's another that doesn't stand out to me. I don't love him, but I don't hate him either.
Stinky: Well, his name is Stinky and his fur is puke green. And he has a mask covering most of his face. Let's just say his design isn't my favorite.
Tabby: I feel like there's too much happening with her design for me. Square and asymmetrical eyes, a toothy grin, purple eyelids, asymmetrical pink blush, and a pig nose.
Tangy: Her appearance seems to be based on an orange or maybe a tangerine. I think she's cute, but maybe the fact that orange is my least favorite color is what stops her from being one of my favorites. I do like the leaf on her head.
Tom: He's fine. I like his mouth and eyes.