Some sources state that 25% of the websites using content systems are using WordPress. Although started purely for blogging, now you can create amazing websites for any vertical using pre-made themes and templates. The advantages of WP is a huge community (that works to improve the product), and large marketplaces to cater for plugins, designs, technical help and much more.  The learning curve is not too steep, but possibilities are endless.
A blog should be about something you love, but it should also be an interest shared by other users as well. You can find out what categories people are interested in by using a keyword research tool and from there you can create customized content that your readers will find fresh and relevant. There is a world of information out there just waiting to be discussed. Why shouldn’t you be the one leading the discussion?