This seems like a fun thread and I can relate to it somehow.
My first contact with Metallica was somewhere in early 90's. I was still kid back then and somebody gave me cassette of "...And Justice For All". I didn't listen to much music then and it was one of the few casettes worth listining that were in the house (excluding my parents compilations of domestic music from various summer festivals). Now, back then I didn't know what metal is, or Metallica for point, but I was stil drawed to it. Like watching horror movies as a kid: it was eerie, forbiden, scary and for adults. The song that really stuck to me was "One" since it was a war-time where I lived, and I wore down that casette for years (except Dyers Eve - casette was only 60 min long and that song didn't fit on it. I heard it for the first time a decade later).
Many years later, I was reintroduced to Metallica with "I, disapper" video that was constantly on TV. Didn't like it that much and same can be said for St. Anger that came few years later (along with the single "Frantic"). MP3 phase was also big at the beggining of 2000 so I had some home-made compilation, which mostly consited of "balladic" stuff (Fade to Black, Sanitarium, Nothing Else Matters and so on). It took years before I listened to their whole discography, and I have the same opinion on it now as I had then: Kill'em All is OK, next 3 are masterpieces (with Justice overtopping RTL and MOP), Black album is OK and Load/Reload have 2 or 3 songs that I like. St. Anger blows.
Then came release of Death Magnetic and I loved that album, still do. I loved it in that matter that I learned first 3 songs from the album both on guitar and on bass (which is a lot considering my limited playing abilites at the time). I would still rate it better then anything in the 90's and St. Anger. Since I got hooked on it, I saw them 2 times, in '09 and '10. After that, nothing new musicaly happened for a longer time and I completely forgot about them. There was a movie, their own festival, choose your setlist tour, Black album tour, first four album vinyl reissues, but to me it all seemed like rehashing the same old-same old.
And one year ago came out Hardwired. I gave it a couple of spins, but after listening it few times, it wasn't really my cup of tea. Somehow I hoped they woulve repeat the riffage from Death Magnetic and this one seemed more "simplified". Production, on the other hand, is great, wish DM would've sound like that. And that's it mostly. I had desire to see them on this tour, seemed like new songs go really well live, but then I saw that nose-bleed tickets for closest dates to me are over 100 EUR and I dismissed the idea. Which is a shame, really. I hope I'll see them again soon.