One of the Greatest Rock Albums Ever [SURVEY]

I was clicking around YouTube and came across this cut, and immediately went to find my cassette tape collection.  Once I found my cassettes, I realized I didn't have anything to play them with.

"Hair of the Dog" from Nazareth has always been one of my favorite albums.  I would even say it is one of the best rock albums ever.  Please participate in my survey below, and share your thoughts on what you think is "The Greatest Rock Album Ever".