I choose AJFA, maybe my favorite album, but i m huge fan of MetallicA and all albums are great, with their style, their sound, they are all unique. Somedays I prefer Justice for All, the other day I will prefer Ride the lighting... Depends of my state of mind.
It's very difficult... I'm a very very big fan of Metallica... I love all songs in general (I don't love St Anger and some of garage inc but for this there are not written by metallica so.. :P but in garage inc there are unbelivable songs :D anyway ) ... But I choose Death Magnetic because I'm young (yeah not a children but not born when master or justice were relased :P ) so it's the album I heard in first with One but it's not an album... and death is a fuckiing good album ... I play metallica every day on my guitar and their riffs are just unbelivable *_*
i choose lulu!! (obviously joking) I mean this is too hard. i'm a die-hard metallica fan, and i listen/play every single record atleast one or more a day! but if i had to choose, i'd choose death magnetic, just simply because it was their first record (in many years) to return to their traditional thrash roots!. Thanks.