Nice closeup! As @oksch mentioned, a more level background would be nicer I think. And perhaps not as strong of a vignette, for my tastes. What are the triangles above the leaf? I’m guessing they are lens flare, but since you can’t really see any other evidences of lens flare, it might be better to edit them out? That should be pretty easy to do. It’s nice that there are not a lot of distractions in this shot!