I finally looked, briefly, in my blogger spam box last night, and when I have some time I'll look into it more, to make sure there aren't some legitimate comments. At least half of the comments the spam filter does let thru look like spam. So if you left a legitimate comment and wonder why it hasn't been posted, the spam filter probably made a mistake.
To those who offered sincere appreciation of my blog, thank you very much. I strive to be helpful and interesting.