The 'shine' is caused by your specular map (_S). Light sections tell the shader that they are more reflective, whereas darker areas tell the shader that they are not reflective or matte.
I would recommend taking a look at your spec map. If you feel its too bright, simply take it into Gimp or photoshop and decrease the overall brightness.
Another reason why people tend to have shiney or sometimes 'wet' looking models is down to the normal map being too intense.
Cheers
Jay.
