Recruiters say this just slows them down when they are trying to get to the meat of the site. Keep each type of work in a distinct section. Include a cover letter that explains your specific areas of interest and why you wish to enter a particular aspect of the industry. If you don't know what area of the industry interests you, such as, feature entertainment, broadcast, etc., do some research before you design your site. Include traditional drawings as well as finished concept art.
Most studios agree that the well-trained traditional artist is the best candidate.
Include storyboards, layouts, and other pre-visualization work. Use the standard file formats for animated sequences. Offer small-format previews of all images and sequences. Make it easy to access high resolution, large-format images for closer viewing. Include a walk cycle.