Hello, I hope I'm not too late, but I think these are pretty good. I just some minor critiques. I've attached an image to try and show what I mean, but I'll also explain here. Basically, the curve of the side plane of the head should match the curve of the centerline. And in the one I drew over, you can see they don't match. But aside from that, I think spicing up your head angles will force you to remember it. And adding a simple neck could add more character to just a floating head. (I tried to give you examples but my digital skills are lacking). If you have any questions, feel free to respond. - Dwight