Speaking of metalcore, I was to a Walls of Jericho-concert last weekend. That was probably in my top ten of great concert-experiences. None of the tough guy hardcore mosh, but just big smiles all around, yelling our lungs out and smashing into eachother. And holy shit their lead singer can move. Jumping back and forth all around the stage, and generally just looking like the whole band was having a blast playing.
The crowd was, after the concert, just a sea of approving nods and knowing smiles to eachother.