2 mics would probably be the most I would ever use for kick, maybe one pointing to where the beater hits and one farther away probably also pointing at the kick (where exactly depends on many factors), to get some more of the dry thuddy sound.
It mostly has to do with the drums, it's not extremely hard to get a drumset to sound like itself when recorded, but it's takes some time and experience to get good at it. In my opinion, a snare drum is probably one of the easiest instruments to mic when it sounds good in the first place. Also keep in mind that Metallica has access to some of the best gear made, so they have that going for them which is nice.
Also, if you listen to early Metallica (kill 'em all is one of my favorite albums ever) the drums don't exactly sound that huge or full or snappy or any of that, but they rock so hard that it still sounds unbelievable. If you have an amazing band the sounds will come, so concentrate on that first and foremost. If your guitar players suck your drums are never going to sound good (this could be argued, but I think you catch my drift).
Long live Burton era Metallica.