What's your Favorite CMS?

I use mostly WordPress with WooCommerce, though I have create several sites with DNN (formerly DotNetNuke)

It depends on your needs and programming skills.
Some time ago I had the same problem and was looking for good CMS.
The first one I tried was WordPress, but I really have no technical skills and got lost in all possibilities. As a result I couldn't create anything nice.
I wanted to create a car related website so I found a specialized CMS for it. It is called GazZup.

If your website is not automotive like mine I would recommend you to look for specialized CMS for your needs: ecommerce, community, blog, forum, etc.

i have an experience of 10 years on the scripts and SEO stuff, so i really recommend you to use WordPress, it's so perfect to manage your content and your hole website including SEO facts, you have the liberty to choose your appropriate plugins and get periodic updates and much more for your online project as webmaster

Well I really like the versatility of Expresion Engine- it literally lets you change any aspect of your site's layout and content output as you see fit. Problem is the lack of plugins compared to Wordpress.

Personally I like Opencart and we also use a lot of Wordpress...

...but another that I was sort of forced into using but grew to like quite a lot was ModX
MODX Web Content Management System and Platform

If even just to add a less than the commonly discussed solutions that also has great functionality.

Strange as it may sound, there really is no 'best' CMS. Obviously, topping the popularity charts and with huge fanbases, WordPress, Joomla and Drupal really hog a large share of the market, but none of them can be called the best. Each has their own strengths and weaknesses. These are three completely different systems with three completely different skill levels. Of the thousands of content management systems available in the market, each has its uniques USP, its own strength. While there are some that are better suited to blogging, others are great for complicated projects requiring more of a framework and yet some others that are better for multilingual websites, and that's just describing a few use cases. WordPress for example, is first and foremost, a blogging platform, irrespective of what many would like to believe. Also, WP is highly dependent on plugins. It is virtually impossible to run WordPress without installing at minimum 5 plugins from the plugin directory. Simply put, the more plugins you install, the more your website performance suffers. Sadly, even plugins developed by Automattic (the mother company of WordPress) can cause massive slowdowns in load time and performance. While the intentions of the developers who are releasing the plugins are good, this often leaves those running WordPress with the task of updating plugins constantly. Similarly, Joomla, even considering the fact that their community has helped spread awareness about open source products on the market, Joomla suffers from the exact same issue that WordPress suffers from when it comes to plugins. They also attract a high rate of hacking attempts on their platform. It too, cannt be considered the best CMS out there. The point here is that there is really no 'best crm' out there. It will work well for you if you are clear about what your objective is. Do not go by reviews and top 10 awards listings. It will work in your favour to do some research and review alternatives till you find one that is best suited to your purpose. Hope that helps!