Any dresses, that accentuate your good point and hide the weaknesses.
If you have heavy hands, it is better to refrain from dresses that are held on the chest due to the corset and choose the styles where the shoulders and arms to the elbow will be covered.
For plump and rounded girls, I do not recommend lush dresses, especially with extra decor, as these dresses will only add extra pounds to you.
The most important condition is that you must feel comfortable in your dress, and not only while standing, but also while moving quite intensively.
Make sure that you can walk freely in the dress, without holding it with your hands or stepping on the hem. The optimum length is from 2 to 4 centimeters from the floor. All my photo shoots are going on in motion, so do not think that you will beautifully pose in the pre-set position. No! You will move: walk, run, spin. And the longer and heavier is your dress, the more boring will be your photos.
Also, I do not recommend dresses with a long train. In fact, in 5 minutes after you come out into the street, it will in the best case be grey, and in the worst case - dirty.
And the last, the most important thing. You invest so much money for that photo-shoot, therefore don't spoil everything with the way how you will look. Because your looks is the only thing that can't be changed and fixed. Instead of bringing three cheap rented wedding dresses, that look very "second-handy", bring one. But that one should look amazing on you!
Here is my Pinterest board to illustrate what dresses are the best for pre-wedding photo-shoots.