I'm always curious to see the top-of-page quip/quote, so congrats on delivering once again.

I think I agree on the ratings so far. Ring Ring is the only one of the studio albums I haven't heard yet, though I have heard the singles and apart from the title track they are pretty bad. I had a co-worker once who professed admiration for the song He is Your Brother, and he went so far as to find a video of the song to try to convince me. But then we watched it and he said something about how "the blonde one" looked great in the clip. So I'm not sure his appreciation for ABBA runs much deeper than that.

Also the sharp curve of improvement from Waterloo to Arrival is indeed remarkable.