I sat there staring at a blank screen for maybe 30 seconds while it loaded. That's really, really bad. The sideways scrolling (which is rarely done well) took 5 or 6 spins of my mousewheel to completely expose the next thumbnail. That's pretty bad too. The individual project pages aren't nearly as obnoxious, but the…
I agree with some of the above points. Wordpress is not always the best choice of template for hosting a portfolio. Try looking at others such as Wix, Moonfruit, Magneto or Joomla. Or even better; script your own with some html and css. In terms of your presentation, ditch the side scrolling design as it's taking me far…