Sooo, after reading your post, I figured I can help. I took a lot of fashion courses. And I do a lot of sewing.
So if you can explain your body to me a bit better...like for instance, what part of your body do you like, do you NOT like...

I would go with a V neck, because it is classic, and classy...as long as the plunge is not too deep. Try not to get too slinky of a meterial, I would go for something that is crisp, but not stiff. A beautiful sheen cotton would be nice. Then you could have accents put in, like a beautiful silk trim. If you do want silk, make sure that the material will not twist. You have to be careful, because if the grain of the fabric is not sewn right, your dress will not fit right.

But try a V-neck. I would not go for Halter. But you can get a dress that makes you feel sexy, without showing a lot of skin. Try looking at different dress designs, and choosing what you like from them. Then go to a tailor, and have a dress made. That way, you can choose the material, color...and its made to fit.