Agreed.Attributing Nag00n's popularity to his character choice is kind of unfair, I'm afraid. The fact is, he is one of those few animators with a keen kinaesthetic sense - especially when it comes to jiggle physics and hip movement; that's what makes him such a huge crowd-favorite.
While many creators need to use models with steep female curves and increased "thiccness", Nag00n can simply take the skinniest, scrawniest girl model out there, and still manage to make her hump, swagger & writhe with the grace & vigor of a porn queen. He's simply that good.
The (cancelled?) Ann Takamaki animation you mentioned is only one example of how often other characters get sidelined by the usual cookie-cutter cast of go-to waifus.
Outside of Ellowas and CakeofCakes, who in my opinion were at the top of the animation game, Nagoon has come out and I'd say the attention to detail, movement and overall quality is on par - perhaps even surpassing them both now. And I love that he keeps the models he uses relatively in proportions to their canon shape.
It's good to see an animator really have that something extra which seemed to be lost when the aforementioned retired/disappeared.
There's too many artists that just want to make a quick buck or two, but at least with Nagoon, you wouldn't actually mind supporting them because of the quality of their works.