Never really liked them a whole lot either, but they did earn serious respect points after they allowed me backstage at one of their shows.
I was there to see American Head Charge, but during Slipknot's set we managed to fight our way to the front (through a feisty crowd of 16 year old's). My buddy held up his Iowa ID (this happened to be during the Iowa tour) and, being that we were in Germany, Corey Taylor came down from his perch above us and had the security guard throw us passes. Right in the middle of a song!
After the show, we weren't really sure where to go and Mr. Root (he is very tall) came out and recognized us from earlier and ushered us back. It was all very surreal.
Turns out, those guys were all VERY cool. They signed all kinds of stuff, gave us free shirts and the lot.
The guys from American Head Charge (who I was actually there to see- huge fan) were fully wasted but did manage to sign a dollar bill for me (which is all I had left). Actually pretty cool, because a few years later Brian Ottison passed away.