Catch 33 is my favorite from them and the monotonous repetitiveness is one of the things that makes this song (or record) so great. Don't know if this makes sense and I don't know if anyone can relate to it, but those endless riffs and screaming over it with little variation (for most parts) drag me right into the music. I always compare this to running, it is monotonous and boring, but after some time you don't feel it anymore and can actually enjoy what you're doing.
It doesn't work with every song, but they are unique in how they sound, I appreciate that.