I suck at designing actual setlists, so this is really just a list of Metallica songs I would love to hear live:
Jump in the Fire
Ride the Lightning
Fade to Black
The Thing that Should Not Be
Welcome Home (Sanitarium)
The Frayed Ends of Sanity
Of Wolf and Man
King Nothing
Hero of the Day
The Unforgiven II
Dirty Window
All Nightmare Long
That's at least one from every album, and two each from my favorite albums (RTL, MOP, and Load). I've never had the chance to see any of these performed live, and if I got to see them all in one setlist, it would probably be my favorite concert ever. Plus, I think there's still room for a few live staples, so throw in Master of Puppets, One, and Creeping Death.