I just think it's beautiful that I can see all the music I've listened to since 2005 (back when it was still called Audioscrobbler, before the Last.fm rename). And I never stopped scrobbling in all that time!
I love these kinds of stats and being able to see how my taste has changed across more than 20 years, since I was a teenager.
I do miss the old community forums they had integrated back in the day, though.