WordPress is a standard compliant, ease of use and fast personnel publishing platform released under GPL ("General Public License") and it is fast becoming the new leader in open source blogging software provider. The core system has sufficient feature for user to kick start a personnel blog, with easy to integrate theme templates and plugins to enhance the features to the system.
Wordpress has been around since 2000 and the ease of use, hosting resources friendly and scalability has been the main reason for it's growing popularity, active contributors contributed heavily to the vast choices of freely downloadable theme templates and powerful yet handy plugins. Huge collection of documentations and articles for you to understand more of wordpress ability and if that is not enough, experience and helpful community are ready to assist new users to get use to the system.
If you are planning to start an easy to maintain yet feature rich and powerful personnel blog, WordPress maybe a good choice for you to start with.