Actually, whilst the image is quite appealing, I happen to agree with Howie on the issue of the drooping branch, lower left.
The appeal of the image lies in its symmetry and smooth flowing forms. The lower branch on the left, drooping with its dense, clumped foliage, tends to break the symmetry in a slightly disturbing manner. We have a lobsided tree in other words. This I would consider a flaw in an otherwise generally pleasing composition.