If you are looking for a Portfolio theme with clean and crisp homepage which loads fast then Sky Theme is a good contender. If your portfolio blog is having thousands of visitors per day then definitely you will have to take out the extra content in the theme but you have to make sure the theme doesn’t look dull. Sky has a clean slider where you can put content about your pages and work. The slider has a Read more link which saves your bandwidth by avoiding extra content. There are no unnecessary widgets in the homepage that means the theme will load lighting fast. For most of the themes if you don’t put widgets, it looks like there is something missing from the theme. But the design of Sky takes care of it all. Also, a portfolio theme is supposed to be clean and sleek as you want to show more about your work rather than design of your blog.