This band is so ridiculous and over the top, and Black Dog is maybe the most ridiculous opening track I have ever heard on a album. 20 seconds in and I don't know how anyone has a reaction other than "what am I getting myself in to here." The ballads and "When the Levee Breaks" is what makes this album, the second side of the record is very solid. Although "Stairway" is a classic, I probably never need to hear it again.
Too many people have tried to argue to me that Led Zeppelin is under rated, but I think they might be the most appropriately rated band ever. I struggle giving this 4 stars, 3 seems right.