Yup, you're getting there.
Sublimity has covered some good advice.
My thoughts are these:
1) On the home page, your welcoming text is too small and difficult to read. I'm reffering to...
Welcome to this site, which contains a collection of images I have taken. My photography ... etc
I'd make this text white and a pt larger in size. It's hard to read against a black background, and even with glasses on I had to move real close to the screen to read it.
2) The Navigation at the top is great, but the 'Gallery' button should take you to the main gallery page if you click on it before navigating to the items in the drop down menu.
I assume you're thinking of adding other sections, which is where I see the drop menu come in use but for someone who doesn't know how to navigate sites efficiently (or are click-happy) may click before the drop menu appears.
Hope that helps