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Theyre very good for not have taken a class. But, the first too vignetted. For the second, try taking out the rock on the left, it distracts your eye and doesnt let your eye flow through the photo as easily, and maybe crop it slightly on the left.The third is really nice, I like it. Try bringing out the texture in the wall though. For the second to last, the spot just above his right wrist is really bright, trying making it less bright. And the last, I like ALOT. Its slightly centered but, because the model has things to balance it out it works.(: