I found Joomla good as a CMS before my knowledge of Wordpress improved.
I used to use Joomla for CMS and Wordpress for blogs.
Now I use Wordpress for absolutely everything. The more I work with wordpress, the easier I find it is to replicate features of a typical CMS without too much work.
Overall I found Joomla way too bloated. It came with too many feature that I never needed. I'd much prefer just the most basic things and then addon to it, hence I prefer wordpress.