A while back I was thinking about all my writing in general, and I noticed that all my narrators but one were white men. Then I remembered that in no case do I give a physical description of my narrator, and only rarely is it clear that he is even male. The only reason I see my narrators as white men is because I'm filling in the undescribed gaps with myself. Another reader could do the same, and end up seeing a narrator of practically any description.