I think it's probably because your image makes me think of what real-life manga would look like.
It terrifies me on a deep, subconscious level. That's a compliment, by the way.
( The Hedgehog From Hell, Tue 30 Jun 2009, 22:41, archived)

I see.
I had another version of that with the features even more manga-fied but I find this only slightly manga-fied one more appealing/disturbing.
( Prequal ARRIBA SUPERIEUR PREMIUM COCAO 81%, Tue 30 Jun 2009, 22:47, archived)

Yeah, I think it's just close enough to real life to be distressing.
Top work, seriously.
( The Hedgehog From Hell, Tue 30 Jun 2009, 22:51, archived)