First impression is there's far to much blue. I would have opted for a 3 colour usage system and this alone would have possibly broke out the colours in a positive way giving it a better feel.
I would start by designing a new coloured gradient for the
thead. This will break the style out a little, although there are many areas which could do with some re-colouring because of the amount of blue that was implemented.
The logo doesn't look that great, the images are poorly cropped and hiding the edging with (I think it's the stroke feature) doesn't hide the jaggy edging. I would suggest that you use the pen tool to navigate the curved edges and place anchor points for the trickier parts (like the head, hands) and other areas to give the images a more crispier/sharper look.
Can't place my finger on it but the gradients look very familar as do the collapse icons.
Sorry it's not a great review though goodluck with your site.