When I first read about last.fm, I thought it's such a great idea. I enthusiastically joined. I convinced friends to join, and I fixed a Rockbox bug so I could submit tracks from my portable music player.
However, last.fm wasn't actually useful to me. I was finding new music from a variety of sources, and last.fm wasn't one of them. Last.fm seemed better regarding social interaction; for example the way journal entries can be connected to music is cool. But for the most part I could have just posted on my blog instead.
Part of the reason why last.fm wasn't useful might be that what I played often might not accurately depict what I really like. I'll have to think about this idea some more.
So, I'm going to stop submitting to last.fm and I'm going to erase my scrobbled data. I don't feel like deleting my account yet however. That feels too irreversible for now, and I have some journal entries here which aren't duplicated elsewhere.
If I post more about music I listen to, that will be on my blog here.