I love the flowers, but would have preferred more definition in the background. This may be the "thing" to do, but for my personal likes for wallpaper for my desktop, I want more.
Composition-wise this photo scores an A from me. Technically, the primary object needs to be sharper though, at resolutions greater that 800X600 you cannot see much details. It seems the object was shot too close to the camera or the depth of field (DOF) is too narrow for a macro shot. I would pull back to get the sharpest focus and then just crop.