What can I say, I'm a fan. Can't wait to see current WIP's come our way.
things to consider! (it's a far shorter post to list the things that could use help than it is to list the things i like):
maintaining shape and angle in your rotation. There are a few points where things change a bit. The hair falls down in one or two frames (but it up for the rest), the scarf changes position (negligible really though), but the big thing is that the front and back facing images flatten to the viewer.
skulls. a few things here seem to forget that heads have backs

. mostly just the standing one in stripes, but also to a lesser extent the portrait in the corner and maybe even the blonde.
try adding a color to assist your whites - just a little yellow or something to soften the squares i think would fit better with your style.
Like i said though, love the little collection here.