As long as the curve is not too pronounced(45-90 degrees) i have no preference.Cocks are beautiful to me regardless.
Maybe people should elaborate with what sort of curve they like. Curves come in all shapes and sizes (like my slight upwards curve).
Except for the dreaded S curve, any will do as long as I like the guy attached to it. I do notice that upcurves seem to be more popular, though.
mine curves down... wich is GOOD for sucking...! here's a pic [posted before in my post: what do you think of my pics?]
Mine curves upward--well, it sticks up and then curves back in toward my stomach. It's like a banana sticking up at a 45 degree angle.