My answer on the 29th of August 2015:
If you are serious about blogging, do it on Wordpress. I would recommend it running on your own domain name and on a hosting account you control.
Reasons: you can customise its features, you have control over it, you're investing in your URL for the long term.
My answer today, 13th March 2016:
Having said that, I am now currently running testing Drupal 8 with this blog. It's fantastic! What I like about Drupal 8 is that you can be confident in being able to extend it as your website grows. It is very customisable too.