For a studio shot like this to really work, you have to get all the details perfect. Your flower is immaculately lit. Love the backlighting while filling in all the backside detail. Very subtle. However, the 'studio' camera is crooked on the tripod (or the tripod is crooked) and it is not pointed at the 'subject' that it's supposed to be shooting at. These little things can easily take a shot out of the realm of greatness and reduce them to very good.
TC