You know how much I love this picture - I had to come back! LOL The crop is a bit tight - looser and with something else in the background close to focus would have made a better composition. The flowers colors look un-natural, as if some colors in the flower were lost during the desat process. Excellent workmanship separating the flower from the background. I think if you had a friend look this over before you submitted it - you'd have picked up on thes points. I always let someone else pick the best one for me.
Very nice hues seen here. I think I may have liked to see the shot with less cropping and the center having a contrasting color of some sort instead of the black. This may have not been an option, though. The edges a bit rough on my monitor.