I was going to make a Megatron, so I started with his head, but one version was too hard to build, so I tried another. Some of the heads, like the ROTF, DOTM and TF animated incomplete head were built just for fun.
About this creation
TF DOTM Megatron head
TF ROTF Megatron head
TF Animated Megatron head (after his body was destroyed)