One thing that immediately struck me was the dashed underlines for links. While it's not any kind of standard, it' has become somewhat of a convention to indicate <abbr>s and <acronym>s with dashed underlines, which you can then hover over to read the full-length phrase. I didn't expect to be able to click through using them - particularly when they underlined things like 'CSS' and 'XHTML'.
Overall, it looks clean and tidy. I would agree that the design doesn't shout 'portfolio' to me. The breadcrumb navigation in the footer is a little confusing, and I feel is unecessary with the volume of content you have. Perhaps if it was higher up, and had better indication, such as '>' separators.