Good rule of thumb: If you ask for an in depth critique, you should be willing to include your own comments with your photo when you submit it. Does this photo not have any meaning or interest to you personally? If not, it's not worth asking for an in depth critique. You have to care about it before you should ask someone else to do the same :)
This flower has a nice texture to it. I can see the tiny hairs on the petals. The composition here is rather static though. It's not composed in such a way as to highlight those finer details and give any depth to the subject. This particular composition also creates some amount of distraction from contrasts in the background.
The center of this flower seems to be the main point of interest overall. Maybe a very close shot of just that portion of the flower would present a stronger image. You could spend some time focusing on the elements that give a subject strength rather than the subject as a whole....
Nice, if somewhat unimaginative macro. The composition doesn't quite work for me, it looks like you have cropped it so there is the same amount of space on the left of the flower as the right. This places the centre of the flower in an awkward position within the frame. The purple border really puts me off. The background is a bit dull and chaotic, not really bringing anything to the composition.