Right now I am very partial to "Slip Inside This House" from
Easter Everywhere by the 13th Floor Elevators.
http://youtube.com/watch?v=nwSA0TckwbkSure, "You're Gonna Miss Me" is a lot -tighter- in terms of writing, but I do think that the multi-minute meandering is really suited to the Elevator's sound. There's just something really satisfying about how triumphant the chord progression on the verses, or for that matter the entire song, are.
Sometimes, though, I feel more angry and it would be the Rocket From the Tombs (about 75 or so percent faster) cover of "Search and Destroy." Because it is pure rock'n'roll self-destruction in a two-minute package.
My opinion varies from week to week.
Re:Metallica, I didn't hate Load or Reload, but I basically haven't listened to them since I was 16. I think we can all agree that St Anger was some of the shittiest shit a rock group has every shat? Yes?