Maybe a good extra portfolio feature would be an option to place “next-project” and “previous-project” buttons in the bottom of a portfolio single item. I noticed the arrows in the headers of portfolio single pages but to me it makes sense that when a user browses a project all the way to the bottom, he can click to the next project after watching the whole page … and not scroll back to the top of the page to go to the next one.
Now it’s not possible without adding extra html/php code, and it’s pretty hard finding the right file to include that html code :).