Friends now you should stop blog commenting by your targeted keywords and continue like this:

Brand Name + Keyword
Username
Brand name@keyword

I agree. Now use user or profile name instead of Keyword in the Name field for Blog Comments.

To use User name instead of keywords is the best technique to comment on blogs.

I don't think Blog commenting help that much in SEO as most of blogs are nofollow nowadays. And in dofollow blog you will see lots of comments on blogpost so you will get very little link juice.

Keyword research is so important for effective search optimization. If your con ten is optimized for search terms that your target isn't using, your site will have a difficult time being found. It's also important not to discount branded keywords for those who are specifically searching for your business.

To use User name instead of keywords is the best technique to comment on blogs.

You should not use your brand name to comment on blogs. Just put your real names.

Well, it's really good feature for blog commenting, we always metion our proper name instead of belonging keywords.

I agree with you all but now a days mostly bloggers allow only those comments in which commentator use the real name. Other wise they consider it as a spam and throw it in trash. However you can get the traffic through the blog comment but can't make a back-link because through this you just increase the amount of no-follow links.