Its amazing how different they look when limited to the engine used in the game. Besides the baron of hell, they almost look better in game because your brain interprets what it wants to see.
http://img146.imageshack.us/img146/7460/cyberdemon1sg.gif
Growing up, I always thought his eyes were those little black dots (i guess his nostrils) just above his mouth. After looking at the statue his eyes are really next to his horns. This heavily conflicts with the box art of DOOM 2. My whole DOOM paradigm had shifted between my very own eyes (no pun).
Anyways, I still prefer looking at him the way I did as a child. He looks much cooler that way. Try ignoring his eyes on the sides. Its almost like hes permanently squinting, like an angry drill sergeant.