for my main blog i really like blogger. it is easier to use now and it lets me add a but of codes for toys on the side like my goodreads, full moon updates, etc.
i use vox for my personal blog. i just use what comes with the blog or social network site. i also use ping.fm to help me keep up with all those social site. it enables me to post at several at one time! very cool free tool, check it out :)
I use Wordpress, but haven't tried any others. I have noticed that Blogger blogs tend to have nicer designs. I don't know if they come with Blogger or what. The one time I found some really nice free mom blog designs, they were only good for Blogger. I have heard lots of complaints about Blogger though.... At the same time, Wordpress really bugs me when I go to the Codex and it has wrong information, which it almost always seems to. The other day I was trying to figure out how to turn the "more" tag off on my home page and the Codex said it should default to off on the home page. Finally my husband had to put code in that told it to turn off on the home page. Fortunately, he knows php or I wouldn't have been able to do it. Then they upgraded Wordpress yesterday and it updated that page and I had to enter the code all over again. Irksome!
I'm a Google fan overall. I use Blogger & Gmail. I think Blogger is user friendly, but you can still tinker with the html in your layouts to get a unique look. Now-a-days, Blogger has a lot of the same features as Wordpress, so it's all good. :)
I use blogger. I am a creature of habit and hate change. This was the easiest for me to use when I first started. I have tried the others. They all have their pros and cons but I like blogger better still. I like the functionality of it and (i could be wrong, but) I think it gets indexed quicker. Things may have changed since I last tried the other options, but like I said, I am a creature of habit and I am happy with blogger.