Why should you use WordPress? Well this question was answered very nicely by the folks at Become a Blogger. Now, I may post all the videos here but after you view the first one you will find that you can simply stay on the site and view the rest.
The videos are really well done. You will enjoy them.
So go and view the first video called, Why You Should Use WordPress.
Thanks for the mention of becomeablogger.com! Much appreciated!
Just noticed that you’ve got the wrong name and website address for it in your first link. It should be http://becomeablogger.com.
PS: Love your blog!