1) Very nice shot. I like the composition here. The model's body is turned into the frame nicely, towards what is an appropriate amount of "dead space". (I also like that it's not really dead space, the white flowers give just enough life to that portion of the image.) I actually like that you cropped some of the crown's top. That crown is a great choice for this model, it works very well with her complexion and hair; it is ornate enough to add something to the image, but by cropping some of it out the crown does not dominate that portion of the shot, my eye still settles on the model's face. The only negative that stands out to me is the tuft of hair escaping out of the top of the crown, hanging over it image right. If it can be done well I'd try to clone that bit out. (Remembering to keep an eye on and to wrangle hair is always a weakness when I shot models, so I understand.)
2)This is the weakest shot in the group (not that it's horrendous by any means). First thing I notice is that the model looks very rigid, not comfortable at all. Her body is very vertical; her arms are very straight down to hands which seem to be holding on to the rail (rather than just resting on it); the opposing angles between her body (facing well to camera left), face (well to camera right) and eyes (probably pointing at the camera but seem to be looking back to camera left) give the impression she's contorting a bit; her mouth being closed suggests some concentration or effort to maintain this position (contrast the feeling her mouth gives with the images right above and below). I actually suspect she was more comfortable in this position than it comes across, but that's what these visual clues tell me. Slightly turning her body and face back toward the camera, giving her head a slight tilt, and relaxing the mouth would make a large difference I suspect. The lighting also seems a bit flat - perhaps this was a case of trying a bit too hard to use the fence when it wasn't meant to be?
3) Another shot that I really like. I like the slight tilt up to her chin and eyes, it conveys a certain optimism to the shot. The only slight critique I have is that the focus seems to be more on the flower in her hair than on her near eye. They're both in almost the same place so the difference isn't much, but there is enough detail (particularly in the dark petal at 6:00) and enough light striking the center petals that my eye wanders that way, away from her eye. Nonetheless, a beautiful capture.
4) Another one that I really like. I like the quality of the lighting here - it's maybe a bit flat and underexposed from the front, but the natural light as rim light in great. In general I tend to find tilted images a bit overused but here I think it really works, particularly in conjunction with your shooting angle and her direction of gaze. (Here comes the symmetry-loving engineer in me...) The only negative comment I have is that the structure of her bodice (the underwire) is off to the side of her cleavage, creating on off-center feel to the area. Okay, yes I'm a guy, but I also think that because her skin and the necklace(s) create such a large light area in that portion of the frame, the dark dress and the dark line of cleavage do catch the eye a bit, so this offset is noticeable. Again, that's a very, very minor quibble.
5) The second weakest of the set. Again, I think you perhaps tried too hard to incorporate the posts. The light on the model and posts seems very flat though there is nice light in the background. I like this one better than #2 because her body position is more interesting, you can see some lean to her body and a tilt to her head. I think using the center of the arch of posts was a mistake, I would have used a lower section off to the side. Using the tall center posts puts her hands up too high - her arms are up high enough that her shoulders are slightly hunched, and her neck (and the bottom of her chin) are hidden. For this image as-shot, you might want to look at cropping off the left, removing two and a half posts (leave the one just beside her). That removes a lot of the flat lit bush, so the overall lighting becomes more balanced. It removes the posts which begin to get shorter, so the viewer can be fooled into thinking the posts continue to get taller off camera left. And it moves her off center which I think would work very well with her body position.
Overall I like them, I'm just trying to nit pick because that's the only way we learn (take or leave my advice as you choose). I'm jealous of the quality of models (and makeup/hair/stylists) you work with.
