I've been carefully ranking my music collection in iTunes. I reserved five stars for my all time favourite songs, songs that changed my life, songs that I think of when I think of major iconic musicians. When I started using Last.fm I got the idea to listen to all my five star songs and 'love' them. Having transfered that meta info I could then access it using their API and a bunch of PHP code and make this, my latest greatest mashup.
Doing It To Death Pt. 1 is one of my favourite songs of all time.Perhaps you are interested in adding this to your collection.