http://www.marmoset.co/toolbag/learn/materials Have a read of that. With all your maps, you're trying to define a material. How does that material behave in real life? Does it have a sharp specular highlight or soft? Is it reflective? Starting off, your gloss should be fairly basic and consistent. All of the same material…
I'm using 3Point Shader Lite in Max. I've already upped the gloss values in 3point, and it looks better now. It's alright as far as I can tell. I'll definitely play a bit more with it to see if I can a better effect. I highly doubt I can, though. I only have the lite version so it's very limited.