What has always identified Slipknot for me are pretty brutal hardship during the verse and then very melodic singing in the chorus that invites you to sing along!
What I find praiseworthy is that Slipknot no more "best-of" album have released their hits and, like many other bands by force market even if Slipknot now had far enough hits! But this album already has 7-10 Best-of suspicious Hammer songs!