Easily my favorite Slipknot album. From front to back, All Hope Is Gone is packed full of some of the best songs Slipknot has ever written (Sulfur, Psychosocial, Dead Memories, Gehenna, This Cold Black, Snuff, the title track).
Honestly Iowa and S/T fell off a little for me, as good as those albums are. I think S/T has a couple of forgettable songs and Iowa is kind of exhausting, Metabolic and New Abortion are pretty meh, and a lot of the lyrics are kind of bad in both albums, but especially Iowa.