I was at school once about 2 years ago. I was really into Queen at that time. I friend of mine came in and recommended 'Stairway to heaven' to me.. I gave it a listen when I came home. I listened to it and I was absoutely mesmerized by the song. I then thought 'I have to listen to what other stuff these guys have done'.
My first 5 Led Zeppelin songs were, in order:
1. Stairway To Heaven
2. Black Dog
3. Rock and Roll
4. Ten Years Gone
5. Kashmir
They are the golden five. The ones that got me into Led Zeppelin.
Within a Week, I bought the 1990 remasters CD. For some reason, I didn't even touch Disc 2.