I've just changed my settings to make it a little easier to leave comments.
I noticed that when I wanted to leave a comment on someone else's blog if I had to sign into my Google account, I'd usually skip it. If I had the option to use Name/URL or Annonymous, I'd leave a comment. Maybe that is just me. Still it finally hit me that I should check how my blog was set up. Sure enough mine was set up by default to require commenters to have a Google or some other account to leave a comment on a post.
Sorry it has taken me so long to make this correction.