It's good - because you can improve your rankings for that keyword. It's bad - because the blog owner may delete your post for this reason. If you are using blog commenting to improve your position in the SERPs for certain keywords, you will need to use those keywords as anchor text (in the name section) and hope your comment is relevant enough to make it stick. In my experience, most blog owners are fine (with leaving your anchor link intact) if you provide a good quality comment.
It is good and bad, but personally i don't waste my time doing some thing that will probably get deleted for a little link juice. for example if you had your own blog and you saw "free Boner Pills" as the name on one of your blog comments you would probably delete it and Google might not give you link juice unless the link sits awhile.
Why waste time to take the risk, submit your site to quality human-edited web directories to improve the ranking.
Hi, type in 'do follow diver' into google, it is a do follow search engine that will show you the blogs that you can use your search term in the name box to get better links. These will not be deleted because the owner has agreed to this strategy but do not spam them, then they will takle you off. Post as normal using the keywords of the blog post(that helps them) but use your search phrase in the name box (that helps you) Dave
as others have said, the problem with using anchor is losing most of your comments after a review from the owners, however there is a way to maximize your results, if you Write a Long and High quality comment of 300 words or more, the owner will probably keep it regardless of the anchor because it brings extra value to the article and to his readers, if the comment is Genuine your link will probably stay.
does this apply to blogspot too? what about the links you add on the page does it also get the nofollow added?
I think they get approved less by blog owners, especially if it is a do follow blog and they are more aware of SEO spammers.
Keywords as name is a known seo technique to boost your ranking for that keyword, yes it works. Of course, as others have pointed out it is riskier as far as getting to keep your link. But what's the purpose of a link of it doesn't have relevant content / keywords to your content in it? I say take the risk.
Honestly, I just use the name of my blog as the "name" when commenting. Sure it doesn't help with other keywords, but it keeps my blog at the top for it's own name and it lowers the risk of the blog owner rejecting or deleting the comment as spam.
I usually check to see if others are getting away with using anchor text for their name on previous posts or not and if so then I will use it on my comment.
If you have keyword as the link this will help you increase your serps. If you have name I would say that it would help you increase your PR. As simple as this. "A link is a link."
If its a dofollow blog its always worthy. But most bloggers will not approve comments with keywords as names especially when it comes to webmaster niche!