Free blogging sites, like blogspot.com, are good to start blogging immediately. Just enter your email address, password and you are a blogger. You can post from iPhone, post videos, use your custom domain. Writing posts is what you do. Then comes the desire to change the layout, improve the usability beyond what the free blogging service allows.
It is time to experiment.
I am splitting this blog into two blogs.
http://wieslaw.com
http://wieslaws.blogspot.com
I have to tell you that I am glad that you did not completly bale out of the cozy blue blog. The new one has the more pro info style: a little intimidating. But congratulations on multiplying. It is a good sign for your prosperity!