I am so deeply in love with that magnificent song, it's even my favourite Led Zeppelin song.
Hearing this, I'm always like "What happened to our music?!" ... No, really. Why is the music of a guy called David Guetta famous? He's not even using real musical instruments, oh come on!
For me, THIS is music, forget about Katy Perry, Lady Gaga and Pitbull. Led Zeppelin is a legend and deserves a lot of respect. "Babe I'm gonna leave you" is such a powerful song.
"It was really, really good. You made me happy every single day, but now... I've got to go away!"
By the way, it's a good song for broken-hearted people ;-)