i've been capturing my charts on december 12 of each year -- the day i started using last.fm -- to track how my listening habits change over time. here’s how my top 5 artists and tracks have progressed over the past 4 years... though obviously, the top 5 artists have not changed much at all, beyond the piling on of additional plays for the same few artists. i have no problem with that though, the silver jews, destroyer and smog, in that order, are without a doubt my top 3 artists for the years 2005-2010... so it seems the last.fm charts are pretty reflective of my tastes.
looking at an expanded selection, even the top 10, there's a lot more movement... but i think over a long enough period (10 years?) the changes in the top 5 will be most telling.
Last.fm year 1 – overall charts
as of 12/12/2006
tracks played 14,370
top 5 artists by plays: 2006
1) Silver Jews
4) of Montreal
5) Joanna Newsom