IMJ, I think the others have all raised good points. On the other hand, many of your other looks are equally (if not more) dramatic -- and the photo locations have also been terrific (I remember one in particular where the graffiti colours echoed your outfit...and some cool landscape ones...). So...
At the same time, the photos themselves pack a huge punch here in combination with the outfit. The lines of your outfit -- juxtaposed against your beautiful curves -- and then the strong perspective lines of the train tracks.
The simple grey, black, and pale blue backdrop allowing the bright black and white to stand out. The rough texture of the stones against the sleek fabric of your outfit and your shiny necklace.
And the interesting use of an almost ubiquitous item -- so many of us here and in the blogosphere had a skirt like that last summer and it was styled so many ways - yet yours looks completely unique and very "you."
In short, you look amazing! No wonder people loved it!
But yes, it could have something to do with people loving the body con nature. You have a gorgeous figure and many plus size women probably want to look like you (well...lots of women of any size probably want to look like that!). So perhaps there is a bit of idealization going on.
One last thought -- this is a spectacular looking yet very EASY outfit. Of course it wouldn't look as great on just anyone, but it's the kind of outfit a person can immediately see how to translate. That might also make it popular. Of course, many of the copies would be nowhere near as good, but nonetheless, it would have seeded inspiration. Which is a pretty cool thing!