I think this goes especially for the girls because while anime females look far more caucasian than asian the whole bishonen thing is, I think, origionally pretty much a Japanese/Asian thing.
So if you find yourself more attracted to somebody that looks like they're from Vampire Knight or Revolutionary Girl Utena that could be from anime exposure.
Hmm. Though I suppose guys could have picked up an anime fetish. By which I mean things like lolicon, a thing for sailor suits, glasses, stuff like that.