I love Wordpress. (More to come)
Supporting Research

http://orderedlist.com/articles/content-management-survey-results

The famous web designer Jeffrey Zeldman lamented on all the time wasted using the old way of designing web site

http://www.zeldman.com/wordpress/

This site is powered by WordPress. For nearly eleven years, it was powered by hand-coding. Let me put “nearly eleven years” into perspective. It’s 3924 days. And it’s about how many times I opened an HTML editor to update this site’s content. I loved every minute. It took a great publishing environment to make me switch

He also commented on why he used Wordpress

Respects web and typographic standards

I can write in XHTML, knowing the CMS won’t mess it up. Or I can write in text, knowing it will get converted to standards-compliant XHTML, complete with typographically correct punctuation. Some other high-end blogging software does this, too, but you have to install plug-ins to make it work. WordPress does it out of the box.

Wordpress is SEO optimzed

Currently it may take hand coded websites up to a year to get a listing with Google, the Wordpress Software usually ensures a listing in a matter of days. If Wordpress is setup to use Internet Search Engine friendly permalinks, that use real words to direct to pages and posts rather than symbols and numbers, this definitely helps your rankings for certain keyword phrases.

For the small business owner, it makes editing your website very fast and easy. You can have a new page in 2 minutes, you can change the navigation structure easily, you can even change the ‘look’ of the website with one click. Once you have “proved” the site is to be trusted in search engines, when you publish a new article, it can appear in Google immediately – and at the top of Google results,.

Many Reason Why I am using Wordpress as my main CMS

http://www.cssaddict.com/blog/wordpress-as-a-cms/#more-23

• It separates blogging system to the Page system
• You can have multiple user/author roles
• You can customize your homepage
• You can use different templates for different pages and even categories or posts, or even parts of the site.
• There are so many plugins developed for the Wordpress platform, that not many other open source systems can compete with it (it even has an e-commerce plugin, to turn your site into an eshop).
• Fully valid compatible Web Standards code (the editor helps).
• Extremely good SEO, through the use of plugins
• Also has many Statistics plugins to choose from

More than 1500 plugins, so you can extend your wordpress installation can be found here: http://wordpress.org/extend/plugins/

http://www.packtpub.com/article/wordpress-wins-best-open-source-social-networking-cms