I've been scrobbling for a few years, but I didn't actually start paying attention to last.fm until a few months ago, looking at artist pages, user profiles, etc. It's pretty fun and useful, as it would appear at this point that I'm a hopeless music addict. I just realized that I can make a "custom selection" of top artists for my profile page, which is a nice idea, because it can more accurately express my "overall" listening habits, especially going back before I started scrobbling. I love this kind of obsessive internet self-reflection. It's a kind of cultural revolution whose…