What blog site do you recommend, or better yet what do you use for your site?

There’s none that are perfect, but there are strengths and weaknesses.

I use WordPress.com and I have some significant annoyances with it (mostly that it sticks a lot of useful features behind the relatively high-end paid accounts), but it’s much better for writing and editing than Tumblr. 

I think Tumblr is better at growing your audience than WordPress, because it’s got a lot of people using it to read stuff (I get the sense that WordPress is used for writing more than reading) and the tag system puts your stuff in front of a lot of eyeballs. Its writing and editing software is not as good – there’s no auto-save, for example, which has meant a lot of my posts getting eaten. 

Haven’t tried Squarespace or WordPress.org (much), and I had a bad experience trying to do a multi-author live-blogging with live comments with the latter.