Well , here are my thoughts... it starts off Great, really nice header you got going on , unique , with style and eye candy , very well done there, the logo i very neat , i like your ninja you got there..
However.. and here is the dilemma... you started good, but soon as i get to the navigation im confronted with a very dull design.. Stock vBulletin navigation and , just a couple color changes here and there..
It looks like a great header , stacked on top of vBulletin default design , i would recommend working a bit more on your header so it doesnt look like it got chopped off, and pasted on the header..
You still have some default "blue" colors here and there, look for those stylevars and change them...
It looks like your off to a good start however, keep working on your style , and im sure you can achieve a great unique site... keep up the good work ... Customize the menus too , that would be nice

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Overall i would rate a 6 out of 10 , and thats because of a good nice header you got going on , hope it helps .
Regards!