I think it's mostly the tall, fat neck that makes the head look so tiny. Making the neck smaller might make his head look a little more natural. Other than that, very nice work there. Is he really painted blue or do the pictures just make the purple look blue?
I've been working on one as well. Rhinox555 is right just lower the head/shorten the neck and it looks much better. I really like your paint job on it. It looks great.
It's amazing how all the new mold megatron toys look better colored in galvatron colors. like animated voyager megatron,WFC Deluxe megatron,Rotf leader sized megatron. great job on the WFC galvatron custom. it looks better in galvatron colors.
wow, I think the tiny head actually helps the look. He looks like a what galvitron would if here 90's comic super hero. (comedically huge muscles, and tiny tiny head)