Machine Head are awesome in pretty much every way.
I was nuts on The Blackening when I first got it, but it's dropped off a bit again. I mean, it's still better than most metal albums made in the last ten years. I've said this a million times, but I consider A Farewell to Arms one of the best metal songs ever written. But while most of the longer tracks on that album are excellent, Halo has a bit of a 'long for the sake of it' feel, and Slanderous, though the cursing isn't without purpose (I haven't listened to that song in a while, but if I remember correctly, he's saying we create division between each other needlessly by turning all sorts of things into negatives and bashing each other when we could accept our differences and avoid it), still feels awkward a lot of the time.
Burn My Eyes, on the other hand, is actually flawless, and easily one of the best metal albums ever made.
Through the Ashes of Empires is strange. I find when I listen to it right through, there isn't a weak spot on the whole album, but if you take separate songs, most of them are a tad short of the tracks on The Blackening and BME. Still, there isn't a bad track, or even an average one, on the whole album.
I've been umming and aaahing about The Burning Red and The More Things Change forever. Both are still pretty good albums. TBR is the better of the two to listen right through, and probably has a better set of best tracks. It kind of has the upper hand for me simply because TMTC is just the band trying to make Burn My Eyes 2, and not doing so well, whereas on TBR, they're trying something different, and not doing too badly.
Supercharger is terrible. Bulldozer, pretty good. Deafening Silence, okay. The rest, terrible.