Really, there isn't a single bad song on the 1st 4 albums

Yes, Enter Sandman and The Unforgiven are good. Nothing else on the black album is good. I'd have liked Nothing Else Matters if it wasn't basically sung in 4 notes

About St. Anger...the style is so completely different from everything else that liking it becomes a matter of personal preference. I like it more than the bland, characterless songs from Load and ReLoad.
Machine Head - Aesthetics of Hate