Back from the holiday and obviously too late for the Metallica ranking. But I give it to you nonetheless, if only just to annoy you with my probably controversial ranking
Load (the most consistent and varied album, and yes, I'm serious)
The Black Album (heavy but without much of the bloated stuff of the previous albums)
Master Of Puppets (half absolute classic, half nearly forgettable)
Ride The Lightning (good but not that great)
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And Justice For All (with better production it might be higher, but not much)
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Kill Them All (I like the raw energy but not most of the songs)
Death Magnetic (some decent songs but most are too long and bloated)
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ReLoad (clearly the leftovers, one or two good tracks)
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St. Anger (just no)
I am more a casual Metallica fan and find that almost all the albums have a lot of filler material to them. And Battery is one of the silliest songs ever recorded (maybe if it would be played tight and on time it would be better, but as it is it's just a bunch of random noise pretending to be heavy and fast).
And I have a problem with Lars' drumming style and sound, not only on St. Anger. I never liked it from the beginning and he clearly didn't improve over time.
Kirk had some good solo spots on the early albums but mostly it's "kick down the wah and fiddle around" and it ruins a lot.
The bass players are interchangeable (even Cliff up to a point) because you almost never hear them on the record.
That said, I think that James is one of the best rhythm guitar players and riff inventors in metal and a fairly good singer. If he got a better backing band I would like Metallica more.