I just pick cute villagers, but there are a few exceptions.
Merry was the first villager I fell in love with in Pocket Camp. She was also one of the first I aggressively pursued her photo for in Pocket Camp. Still haven't gotten her photo yet in New Horizons, even though she's probably with me the longest, ever, among all other villagers. Like, you could request all kinds of giveaway villagers from me, 'kay? Just don't request for Merry, because there's no way I'm giving her away (at least not before I get that photo...).
Agent S was one of the first three villagers I met on the Mysterious Islands (the other two being Jambette and Clay), and she was the only surviving member of that trio whom I tried my best to summon back again and again no matter how many times she moves away. I have a special attachment to Agent S because she's just so cute, the way she dresses up as this cool superhero. I think outta the superhero team though, I definitely like her a lot more than Kid Cat. lol But I did move Kid Cat in because of her. They're now neighbors (after much effort to move around the houses...).
Julia was (kinda) a special exception because I also met her during Pocket Camp, but I didn't immediately think of her. I did really enjoy her "Dahling" catchphrase, and out of all the snooty villagers, she's probably the cutest too, not having that high society stuck-up look, and instead having a cleaner, more down-to-earth face.
Maple's cute, so no surprise there. Had to choose between her and the other Normal Villager, June. June was only available on the RV Welcome Amiibo card, which I didn't acquire until recently, so I picked Maple instead. I really felt bad about hitting June with the net to get her to move out back then, but after seeing how nice she is, I just grew closer with her.
Frita was one of the first two villagers I met on New Horizons (the other being Hamlet). She's the true exception among these cute villagers because I didn't find her that cute in the beginning, especially her outfit, but after she kept sending me these really nice letters of encouragement, I grew attached to her and tried my best to keep her moving back in. She's only moved out like, maybe twice? Far less than Agent S, whom I feel closer to. Frita is like this big sister/mother to the other villagers.
Marshal is an easy choice. He's popular for a good reason, having that sad-cute look. Plus, he's sulky like me. My Marshal Amiibo card stopped working a few days ago, and I immediately went out to get another one. Marshal's cool.
Beau was another villager I met on Pocket Camp that I liked. He's kinda the odd one out because I needed a lazy villager to have as many diverse personalities as possible. It was between him or Fauna, and since Fauna's Normal, and I already picked Maple, so Beau got in. And he's cute enough too, being close enough now to send me letters. So much dialogue about food... lol I love him.
And finally, Cheri. Man, Cheri. Yet another villager I met in Pocket Camp that I liked a lot, probably almost as much as Merry, almost. She has this cute tomboyish personality going for her, being tough yet cute at the same time. Unfortunately, she's the one who gets rotated out the most often during my villager giveaways. I hope for the day when I could get some time to get close to her without having our friendship level reset.