Seconding Tyson Murphy's 3DMotive tutorial, it's fantastic. Some other sources you might want to check out: Both volumes of Vertex have texturing tutorials by two WoW artists, one fully hand-painted (Volume 1)and one from Zbrush bases (volume 2) Tamara/Firstkeeper's deviantArt portfolio, which has a lot of her WoW armor…
With hand painted styles I would avoid using the color black for AO and shadows. Darker colors are okay but you don't want the colors to get close or reach pure black. I would also second what Praetus has suggested. Check out the Tyson Murphy tutorial on 3d Motive it's really good and helpful.
So, I'll try and cover a few things but we'll see how it goes. First of all your facial anatomy is way off. The landmarks of the face are all pinched too close together. Typically, the eyes should have about an eye width separating them but yours have about half of that. Also the hair texture feels a bit "string-y". The…