Jenky

Excellent job! The density and shape of your heads looks great! I'm still trying to master the heads of my SDs. One suggestion, I add a zonker strip to the top of both hooks to give it a little fuller profile and some lateral color dimension. How do you get the hair packed so nicely around the eyes?

I'm not sure what the fly in question is comprised of, but like mikechell stated, symmetry is a big deal. Most streamers that I tie have a spun deer hair head, and if the head is not stacked or trimmed symmetrically (same density and shape on either side of the hook) the fly will tend to "kick" to one side more than the other. Collars can have the same influence.