I really like when you can see the spine when a girl is sitting and bending forwards a bit. I like to see the vertebrae. I'm honestly not trying to creep anyone out, I just like it a lot. Defined cheekbones as someone else already said (Helena Bonham-Carteeeeeeeer!) please me too.
I also like the area from the shoulder to the top of the neck. The more defined and elegant the better.
I also like the area from the shoulder to the top of the neck. The more defined and elegant the better.