Photos reviewed in order of apperance. You know the drill...
Ducky: I am not sure how to start with this one. I think that unless I had read your title, I might not have understood the focal point of the photograph. Unfortunately all I see is confusion. The photographer in the center immediately draws my attention, and the woman in the white dress seems to be a secondary figure. The photo is nicely exposed, no technical errors that I can see. Is this a crop? I would like to see the uncropped if possible.
remrf: I am a sucker for gnarly cloud shots, so if I fail to be immensely critical, you know why 😀 . First, awesome colors. The fact that only black and red seem to be the main colors makes this an image which has a stron graphic quality about it. I would, however, say that the telephone poles and lines make for some distraction. I might framed the shot slightly lower, to include more of the foreground, but this is a two edged sword. The foreground is all black, not too interesting. The clouds are fantastic colours, but kind of taper off at the top. You probably optimized it as best you could. The other problem is that if you had framed it lower, you would have broken the Rule of Thirds. Not that it couldn't have been better that way. Awesome coulds!
nomade: Yes, definate contrast issues. Some parts almost look solarized. I can't think how. On to the photo. There is definately a sense of mystery on my part as to which is the subject here, the wine glass, or the street scene. I can't tell if the glass is in focus, but the street looks more in focus than the glass. I would prefer a much more limited DoF in this case. There is a fairly good symetry, with the immense black space and the wine glass balancing the street scene. But I would like a much more concentrated focus on the wine glass, if it is the subject.
gabrielma: To start, well exposed. No blown highlights, etc. The focus on this shot is also well done. The DoF is very nicely done as well. I really like the isolation of the figure. With the figure turned away it also lends a "universal" air to the picture, almost postcard in feeling, in a good way 😀 . I would say, that as far as framing, I am not entirely sure about vertical. I realize that including all of the trees lends a balance to off set the foreground figure. I might have liked a closer horizontal shot. My constant mantra is always "Get closer!!!", but this doesn't always work. Perhaps a lower shot, or more a profile. I don't know. I think it is great as it is. A definate keeper.
Hope these comments were helpful.
Drew
Edit: I completely spaced and didn't see nomade's picture. Sorry about that. 🙄