You can easily design your own WordPress them. There are many WordPress theme frameworks available that can be used to create a highly professional theme without much effort. You need to design your own WordPress theme when you either want a unique theme for your blog or you want to integrate your blog into your existing website, whether personal or business.
A good thing about WordPress is that you can modify every individual file, provided you have a decent knowledge of PHP — the web programming language in which WordPress has been written. With the advent of new WordPress blog theme frameworks you don’t even need to know programming. You can simply use the interface that comes with the theme framework and completely change the look of the theme. This blog post reviews one of such frameworks.