Are all your clients technical? If not, might want to consider a revamp of your site, make it more what your work will do for them (online presence) than your specific skill set (PHP, Drupal).
Also, I would not worry about making your site high-tech. Plain HTML is fine. A wall of text is fine. But I would focus more on explaining what you can do ("build a website supporting X", "integrate Facebook, cell phone, IoT alerts"; whatever), not the tools or languages you use. For extra credit, link to a few small examples to showcase some of the cool features you can do. My 2c.
Good luck!