I think the cock is the most under-attended aspects of porn.
Not just the cock, but the body attached to it, the voice, etc.
For me, I want the male to be a
prop for the woman to demonstrate her sexual charms.
So I want a nice big cock, a nice, well groomed body, and minimal-to-no talking from the guy.
ps. Christian's blog is an AWESOME look into the life of a stunt cock.
http://www.christiansingstheblues.com/