Really cool 3d modeling and I especially liked the 404 Cartoon Illustration. Nice work on the rendering there.
Here are a few points to consider ..
The header on the top right explains exactly what this site is about. That works well.
The black background helps frame your photos. White may also work well.
the navigation is a little tricky. Rule of thumb is to have all the link options there. The method you have currently employed (where the link of the current pages disappears completely from the navigation) can get a little tricky as the site expands with the inclusion of more content.
Keep the navigation as simple as possible i.e Resume | Portfolio
On clicking on the portfolio it takes the viewer to a landing page which displays all the respective sub-links (illustration, cartooning etc) This actually breaks up the flow of the site. Options you can try out are, have all the listed sub-links on the main nav bar (i.e resume | Illustration | Cartooning ,,etc) Skip ‘portfolio’ completely because your site itself serves as a portfolio.
Keep the header part of the page kinda consistent in height. With your name on the top, and consistent header image size. Also make the header image a home button. It’s a general practice to hit that image to take a viewer back home. On that note, you can also skip using the words ‘home’ in the Nav bar. Alternatively , you can bake your name (txt) into the header image along with what the site description.
I agree with Nmfrazer, It would be nice to have an ‘about’ page telling your viewers what inspires you to do what you do. Probably a peek into your process of creating art.
The category section on the blog side has a drop down. Avoid that if you just have a few categories.
As mentioned by your wife and Nmfrazer, you should surely play around with photo galleries. Anything thats not too fancy so it does not take away the viewers attention to your art.
Hope this helps and yes, All the best!