I'm propably a very bad person, I guess, but the original S&M is currently the only physical Metallica record I own... but I really like it!
While some of the arrangements don't really add that much weight to the songs, I find the S&M take on For Whom the Bell Tolls, for example, as probably the "definite" version of the song for me. The strings in the intro are fucking powerful and James' delivery is spot-on there. I also quite like Load (and ReLoad has some decent songs too) and the S&M treatment elevates those songs in a nice way.
While the S&M2 seems to have a bit too much recycling going on and a couple of strange setlist choices (how in the name of Kthulhu The Unforgiven or Fade to Black etc. didn't make it... props for including part III and some creative, if not perfect picks though), The Day that Never Comes and from the most recent stuff, Halo on Fire are songs I'll probably give a lot of listens. And from the original set, I'm very curious to hear how The Outlaw Torn, for example, turned out.
I haven't checked any YouTube videos or tasters for that matter. I was supposed to see it in cinema, but I guess I was just too busy or whatever and I've successfully avoided "sneak-peeks" to this point, so another week or two won't hurt either. So yeah, I'll give it a YouTube Music spin or two (what a terrible downgrade from Google Play Music...) and decide about potential CD/Blu-Ray purchase then.