Like to give a warning on using Displacement. It does take a bit more resources to render. If you get carried away with the settings, perhaps turning it up higher than 1 you will notice a much larger render time. Add this with a detailed model and ... you get the picture. On one render I had the setting up to 5 and it took a good hour for the render bar to move past the n in rendering shadow. So be judicious with the setting. As regards your texture, be aware that realism includes irregularities. The smoother and more uniform the skin the less real it looks, especially on closeup. Wrinkles and freckles all make the skin a beautiful individual work of art. Little translucent hair follicle protrude from the skin making little bump which create grater sensitivity. So to me at least these things make the skin more appealing and sensual. Take a moment to look at the underside of the forearm. Even there you will see small hairs. Now gently trace your fingertips lightly down this skin. Notice the feeling. That's what makes the skin so sensuous and appealing and, that's what makes a sensuous skin texture. Now you don't need to get that detailed. Give a representation of some degree where the imagination can fill in all the subconscious intricacies.

Are you bluging your bump into bump or displacement? I have found displacement works much better because it actualy displaces instead of simulating it. This is better for edges where simulation is going to still appear smoth.