Unfortunately, it's not just a few. Plus, there are a handful of blogs that do set up something like an entry form without requiring comments or answers and are not listed as blogs because of that.
My two cents, a blog is a blog is a blog and should be listed as such no matter what the entry requirement is.
Unfortunately, this is what happens when things get to be over-categorized.
I'm simple, for me, if it's one-time, no matter what it is, it should go under the one-time category; if it's a daily entry, it should go under daily, etc. :sunny: