Nice work Darkblade for a first time. There's tons of things that could be improved here and there, and believe me, you'll learn more than you thought possible as you go along. The seams, wrinkles, textures, shading, blending, blurring, clean up...it will all come along and would help this pic greatly, but all you can do is improve and this isn't a bad first try man.
I've only been doing this for a couple of weeks or so and I think I've improved steadily with each manip, as you will to. You'll learn new tricks and ways of doing things, it blows my mind how much I've discovered just in the past two weeks, the only way to go is up man!
Study the tutorials here and learn from them, they will help a ton. Also, visit the maniper's toolbox thread in the forums for a ton of links that will help a great deal.
I'll shut up now.