The one thing I might change is the top three buttons and the back button. Improve in the button design to match the overall look and feel.
Remember that you are not designing a website for web designers. Your target audience is for people who just want to see your work and not how good your web skills are.
I would keep everything as it is.

Things that you could improve:

1. Top main buttons design.

2. Add a top button that moves along while the page rolls down and remove the BACK word. We don't use "Back" anymore nowadays.

3. Add a copyright word in every page you have.

4. Add a link to "Home" in your Logo (Steve....character artist..)

5. Add a short / long description of your work (e.g. how did you achieve this / that), to make it more interesting and people can understand more "your way of thinking". These can spice up your work.

6. Remove stevenegan-cgi.com in all your images. Anyone who wants to steal it just need to crop the bottom, so it makes no difference really, unless if you add it on your image bottom. I leave that to you.

7. Add a Contact button that leads people to a Form so they can send you an email through your website. But make sure to add a CAPTCHA to prevent spam bots.

I personally like the signature. It gives personality to your site. Just my opinion.
Design wise, I like the look and feel overall. Nice work and site.

Hope that helps mate.