Many interesting takes in this thread. The biggest thing I want to add here is that this type of neckline is actually not designed for larger breasts. Large breasts would pinch and bulge around the sides, which while maybe desirable in a purely sexual context like for lingerie or pin-ups, is not usually considered desirable from a fashion standpoint. These curved flat necklines are meant to emphasize the natural curvature of small breasts. I see this sort of shape often on runways and models with smaller breasts. (Granted, that body type is the norm for runways. Nonetheless, it means that's not a concern.) For instance, these similar dresses are both modeled by women with similar body types: https://www.prettylittlething.us/black-diamante-strap-detail-puff-ball-dress.html https://www.lucyinthesky.com/shop/aila-rhinestone-babydoll-dress-in-black-64892
So the issue here is not your body, but I think you are correct to think something is off with the dress. You look good in the dress, which is all most commenters are checking for, and that's a good bar. I agree it at least looks flattering, but from a fashion design perspective, it could be improved (I say this not as a fashion professional but as a fashion nerd who spends too long looking at runway shows and analyzing clothes). The positioning of the neckline itself on your torso is a bit too low, not because it's revealing, but because that sort of neckline typically is positioned about level with the armpits, but on your dress it is lower. This makes it look like it's a child sized dress, just with strangely long straps that allow it to hang low enough on an adult to cover their hip area. Do you see what I mean? The straps are about a third of the height of the body of the dress, but normally they are about a fourth or less, I think. This could work so far, if not for the depth of the cut in the neckline simultaneously being too shallow. If that cut was deeper, down to the belly area, then it may make tiny, low-worn aspect of the dress seem intentional (see this dress by Schiaparelli https://pin.it/PO7V3jtHg), but because the cut looks like a typical summery dress depth, it reinforces the feeling that the whole dress is just being worn low. I have an urge to tug the dress downwards from the back so that, like a pulley, the front moves upwards.
No offense to your husband or the other men commenting, but, of course they like it - it's showy and it does fit you well. But this is only the minimum bar for a dress to clear. Models could look good wearing a potato sack, but that doesn't mean a potato sack is a good dress. Luckily your dress looks a lot nicer than a potato sack! Whether I'd keep this or not depends on how demanding you want to be with your wardrobe. It looks very good, really. Much better than the average dress, and the whole outfit is lovely and very iconic looking. But if you're the type of person who wants to own only a few outstanding garments, this does not clear the higher bars of great design, in my unprofessional opinion. I think that your doubts about the dress may be coming from you picking up on that and mistakenly attributing it to yourself rather than the design.
