In addition to reviewing blogs that censor vs. don't censor, you might also consider which ones screen posts before publishing them. Requiring the administrator to approve a post is almost the same as censoring -- it's just whether you end up getting a yes or a no.

All comments on my blog are automatically approved. So far I have only had one case where a person was using vulgar language and I had to remove it. Every now and then a spambot gets through. There are very affordable services like Akismet that can prevent most spam.