There are a select few of the Nude Photography that I do infact enjoy, and see as artistic. But if I had my way of it, I would have no Nude shots of DA.
Yes, what is tastefull is definitly a matter of opinion, but you did ask for opinions.
As for what IS tastefull in my opinion for DA, well lets start off with the basics of art, The elements of art. For example, Line, shape, color, texture, and composition; just to name a few. This particular picture doesnt have any to speak of that I myself can see. yes, she has a shape. She has a form, but all in all this picture is very bland. (Now keep in mind I am not insulting your model in anyway).
Outside of the basic laws of the elements of art, when doing nude art with females there are something that your really need to push to show, the softness of thier form, the smooth line that draws your eyes to linger. These can be done with any woman, of any size, or shape. You did nothing to support this or anything.
Yes, you may have had an image in your head, and it may have come out perfect, but I just don't see it and I don't think that the image you had, if this is it caught so perfectly, was so amazing or even remotely artistic. Sorry, but thats my opinion and I do have backing on this from scholarly sources.