DO Follow Blogging
Talking about blogging, then we talk about do follow blog, why?, because without do follow, blog is just a list of article 
, sorry, i am not provocating you. Honestly no follow blog will make blog’s visitor “lazy” to give comment, because they didn’t get back link from your blog and you all know blogging without comment is not cool 
. Cool blog if you get 50 comments or more in every post .
If you have good blog (say good PR, good alexa rank etc) that not only because your hard work, but caused by your visitor too, so why not give some present to your visitor with do follow blog setup. Agree with me?