I've previously been quite vocal about blogging and blogging for blogging sake 
I had a blog, had bursts of enthusiasm, then left it unloved and withering on the vine for months at a time before just shutting it down. No blog is better than a dead blog.
What is the actual point of a blog? Other than being a place to put down random thoughts, normally related in some shape or form to your main subject. Most of us do it for marketing, in the old days as a cheeky link dump for SEO or more recently to get eyeballs on a post and follow a author bio nofollow link back, as you will be considered a subject matter expert.
But why put a blog on blogger? Why not have all that lovely content on your site and let your audience interact. Or if the subject matter is more unrelated, then maybe consider other avenues, eg social media groups and communities. I think these are slowly becoming the new blogs, as they tend to be shorter, which suits our short attention spans as we flit all over this inter web.
I'd also include forums as part of the social media mix
Forum Blog
But a lot of people still love them and swear by them. Guess it comes down to the old adage, if it works, use it, if it doesn't, lose it.