If you are continuing to use Blogger as your blogging platform, you should consider that you don’t own your own blog.
If you try to customize by using html coding, you’ll run into this:
If you take a look at your code, you’ll notice that it looks somewhat like regular HTML and CSS, but also includes lots of custom tags that make it compatible with our drag-and-drop layout editor and font and color picker.
That’s straight from:
http://support.google.com/blogger/bin/answer.py?hl=en&answer=46870
Blogger doesn’t even have it’s own support page! It goes through Google.
You don’t own your own blog.
Google does.