I wanted to know what some good tunes to play at your first gig (preferably Metallica, or Trivium)

We have 2 electric, 1 bass, a drummer and a singer(guy)

Rock is......Life
Preferably Metallica eh...
You get the idea, just play whatever you want to play!!! If you want to play Metallica and Trivium, play Metallica and Trivium. Just remember to play AT LEAST ONE ballad.
Current Rig:
Gibson Firebird Studio
Limited Edition Schecter 35th Anniversary C-1
Schecter Jeff Loomis Signature 7 FR
Ashdown Fallen Angel
Custom 7 Firebird from Ignition Custom Guitars (check them out)
ESP Phoenix
play anything - play loud, jump around and bust up the equipment... it's all about SHOWMANSHIP. The audience is usually dumb and they want to see SHOWMANSHIP.
Now running an Eleven Rack with Pro Tools 10.3.3 - it's amazing and I'm having ball with it - worth every penny. PT 10 is tops IMO and the Eleven Rack is a work of art!
Ya we have a little bit of our own riffs, lyrics, etc made up.....maybe we can fit it in with a cover or something