In other words, if you could be anywhere in the world at any time based on the music you love, where and when would it be?
Mine would be 1983, somewhere in America, preferably DC. I'd go and see the last and best Minor Threat shows (when they'd got really fucking good), and trip across to Boston to see Mission of Burma sign off as well. Husker Du and Minutemen are both still touring, and just about to hit their prime in 84 with Zen Arcade and Double Nickels respectively, and Black Flag are in the best years of their live performances, before Rollins got really fucked up and Ginn got really antisocial (live in '84 is proof of that). And of course, Sonic Youth are recording Confusion Is Sex. It'd be alt heaven.
It'd either be that, or Texas around the turn of the millennium to see the scene that spawned at the drive in and trail of dead....