Tumblr is a fun, easy and free blogging platform on the web. I've actually been using it for a year now and I haven't had complaints.
It makes blogging really simple and provides neat options for sharing content with others ("text", "photo", "quote", "link", "chat", "audio" and "video"). You can also "reblog" cool content you find with an easy click.
There are some great Tumblr blogs out there including ones with just photos for instance. It also has some catchy layouts to spruce up your site. I recommend checking it out.