New types of blogs

I've been through different blog search engines. I found all types of blogs on culture, music, paintings,... but none very interesting: not complete, few visuals, few links,... But I've got no idea on what type of blog could be created. I thing most of the themes have been developed on blogs.
So if I had to do my own blog, it would be either on a paintor such as Frida Kahlo, on new realism or on neo soul music.