I tried Wordpress for my blogs and it drove me nuts ! You need a degree in rocket science just to change the font ! So I went back to using blogger, it's free and you can still use your own domain name with it.
The advantage with Wordpress is that you can sell your blog and all its content to someone else if you feel like it.
Most bloggers use Wordpress of course and they generally say it's great - so maybe it's just me, but blogger has the advantage of being free.