Even if WordPress was only used for blogs, it would still be worthwhile. After all, it’s free, highly customizable, easy to use, and can be hosted at your own domain. But with the large community of WordPress users providing plug-ins, you can use WordPress for more than just a blog. For example, at least 2 of the webcomics I read, Applegeeks and PvP, use WordPress to publish their comics. Using the YAPB plug-in, you can easily convert WordPress into a photoblog, allowing both photo posts and regular text posts. However you want to use WordPress, someone before you has probably already thought of it, and built a plug-in to do what you want. That freedom is what I like about WordPress; no matter what you want to do, you can probably manage it with WordPress.