Many of his songs carried the theme of being yourself. "All Apologies" was basically him saying "Yeah, I'm sorry that who I am pisses you off, but fuck you, I'll be me."
Sorry to bring this up so late but I just discovered it... This stamp seems to be stuck. I think you forgot to loop the animation, 'cause I've been staring at the second half of the message, "...than loved for who I am not.", for a few minutes now. Definitely stuck. Beautiful concept, still.