Your navigation needs to be much more pronounced. It feels hidden away as if you don't want people to know it's there. More importantly than that you need to label each navigation icon, it's not enough to rely on people hovering over an image to find out where it goes.
Did you develop this website yourself, as in hand wrote all the code? If so you need to put more emphasis on website development and less on design.
In general the website feels rather empty, your work page needs some more content and you need to make it so the thumbnails display some of what they are going to be viewing. There isn't really much to entice me into clicking those dull grey boxes.
I think you could utilise your secondary colour much more effectively and liven up the site a bit if you maintained the dual colour scheme like you have on the home page, instead of only using colour as a hover effect.
I don't like that advertisement in the bottom left. Yes I noticed it and so will everyone else and they will wonder why you can't afford £5 a month to host your website properly!
The home page feels very professional but it needs more content. Unfortunately for me the professional feeling I get on the home page is somewhat lost on the subsequent pages.
