I notice that many experienced bloggers, such as Probloggers, are allowing Dofollow in their comments.
some of the blog posts have closer to 200 comments, the most I have seen is 400+ comments. They use nofollow tag for affiliate link and banner link. Since their blogs are PR4 to PR6, the dofollow feature allows us to create valuable backlinks to our blogs.
Most of my blog posts are also dofollow, except for some of the earlier ones when I listened to wrong advice, and put nofollow.
Do you allow dofollow or nofollow for comments in your blogs?