Well...
[Thread title: Are there villagers that are unpopular but you don't understand why?]
For me, it's Drift, Camofrog, and Soleil. They're both really cute but they're so unpopular and overlooked.
I appreciate, and am impressed by, Hound00med's efforts with maintaining the thread on villagers' popularity rankings. But, I don't take it too seriously. Much of it sparked my interests in experiencing numerous of the Top Tier villagers. It ultimately doesn't determine which villagers comprise the casts of all three of my active towns. (As if all 30 villagers were ones which ranked from Nos. 1 to 30.)
From the three you mentioned, I haven't experienced any of them for as long as I've been playing "Animal Crossing: New Leaf." My first town, Applewin, began on August 17, 2013. I don't think any of the three you mentioned have been in my campsite. From those three, I found myself most interested in Drift. Those YouTube videos are great! And Andrew Arcade, whose town is Arcadia, had Drift as one of his first five starters. I'm not sure if it was Andrew or if it was Drift; but I did have an interest in Drift. That was months ago. There are over 300 villagers in the game of "Animal Crossing: New Leaf." And there are a number I haven't experienced even in a Dream Address visit.
Cousteau. I think he's so cute! Who wouldn't like a cute little frog talking about working out all the time xD.
I just added the Jock frog Cousteau to my third town, Temps. (He replaces Jock anteater Antonio, who I adopted out to a
Bell Tree Forums member because I wanted to try a different Jock.) I was impressed with Cousteau, who I had in a cycle town, and find him charming and very good-looking. I love animals in blue and yellow, apparently, and Cousteau is fine. (And he strikes me as a classic.)