Your material is reminding me of my entry for last challenge. I had hard times to make skin looks like skin. At first sight, your skin is looking plasticy. Unfortunatelly, we can't do the natural translucence of skin only using default Maya's materials and adjustments. There's a good approach you can follow on Steven Stahlbergs site, www.androidblues.com, in tutorials section. Or you can use a SSS skin shader, that will give EXACTLY the look skin must have. You can download this material in www.highend3d.com (and read the wonderful SSS tutorial there), or if you have Maya 7.0, SSS is already part of MR shaders. Anyway, I strongly recommend you read the tutorial on Highend3d. Good luck!