Fine work, Hooty (though I hate acrylics, HATE'EM, I SAY!! - but I digress...). I have found that if you view or photograph a Gigantic Frankenstein head on and from a higher angle, he doesn't look so glum. He'll probably look much happier on that base; wish they'd had ready-made nameplates when I did mine!
And what a cool room in which you've got him standing!
This is a great build up!! He does look sad - I think it was a fad in the 60's that sad things were more lovable? - remember those big head skinny cats and dogs with big heads, big, sad eyes and frowns?