I often do but it does depend on the situation and who is asking. For some it would not matter if I said blogger or mad scientist.
What's the difference between an occupation and a hobby?
A better question is, what's the difference between an obsession and a hobby?
Nobody likes being confined to a box. Definitions can be influenced by opinion. You know what they say about opinions.
This blog started with an idea I had while blogging in my other blog, A Few Clowns Short. Most of my interaction (my definition of blogging requires an exchange of ideas/stories/thoughts between the blogger and the reader - IMHO - oh there's the opinion again) happens over at my other well posted blog.
On A Few Clowns Short I have become comfortably posted. Actually that's true most of the time. Occasionally, I just want to write a thought or two over here. Over on this blog the posting is bit more like a message in a bottle on a big lake. I've received a few very interesting comments but then I've asked a few interesting (?) questions here. For example,
What would Bonzo do?
What would Bonzo do?