Hello,
I just made this (two-sided) axe and I wanted to know what you all thought about it!
Maybe you can give some tips for future modelling.
Feel free to leave a comment! 
Tip: Please post small individual art shwocases in the provided art thread http://forum.unity3d.com/threads/145172-WIP-Small-Works-Art-Thread
That axe looks like it reaches past a few thousand polygons and in most cases will not be acceptable, The axe has a sculpted feel to it and looks like it has been filled with jelly, try and make them edges alot harder and look at some references from games that use weapons close up.
3000000 vertices… bit much?
Give him a break, it’s obviously a sculpt 
And it has promise btw, and as Ben stated you will need to refine the surface about more to make it appear hard. And make sure you sharpen those edges.
~t