Looks nice, but I think that the hitting edge is looking too uniform and I think that it should not have 45 degree bevel there because that makes no sense for me. Additionally I think that it's good to sculpt hero assets such as this hammer, because you can spice it up a lot. There's no way you can model wood like on the image bellow.
Here's another image with cool damaged metal:
Sculpting damage like that in ZBrush is very quick process and can lead to great results. In my opinion modelling is great for assets that are not exposed to the camera for too long because they usually get boring very quickly.
Textures look very nice and combined with some damage sculpted over high-poly mesh would make a great asset!
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