When I was in art school, there was this guy who had a huge crush on me. I found it very strange because he looked so much like me. I rarely see anyone who resembles me. The resemblance between us was quite uncanny, though -- same shade of green eyes, pale skin and dark auburn hair. My natural hair colour is very unusual and his was exactly the same colour. Most redheads have freckles, but we were both freckle-free. We looked like we could be closely related. I found that a turn-off. I couldn't understand why he was attracted to someone who looked so much like him.
I have a friend whose parents look like brother and sister. Both of them have bright red hair, blue eyes, turned-up noses, pale skin and lots of freckles.
I think I'll always go for the opposite of me, though.