Wow, that's a hard one. It definitely changes every few months. Paranoid Android hit me hard when I was 8. I had never heard a song structured in that way, and the fact that a 6+ minute song could hold the attention of an 8 year old must say something about the strength of the songwriting. At the moment I can't get enough of the live versions of "The Amazing Sounds Of Orgy." That bass Thom added makes the song that much more groovey. And the lyrics are sinister as heck, and those drums are sexy.