I think they're all good. The first one, I really like how its soft on the edges and gets sharper on her face, gives it a sort of innocence and I think the selective coloring works as its a very soft color on it, nothing that jumps out and grabs ya like if it had a been a red rose. It works for me.
Like the second one, the crop and all, the only thing I would have done was to have her lower the rose, his bouttoneire (sp?) is already pretty much in the same spot, makes it sort of crowded but otherwise I like it.
The third is nice as well. She's got a great smile. Again would like to have seen the rose lowered and maybe hold his hands or something but otherwise I like it.
They look sharp, the colors and conversion is good, lighting and so on. Great job.