I've never even been to a metal concert but the best concert I've ever been to was Rock the Bells in New York last month. It was a "world class hip-hop event" headlined by the Wu Tang Clan and Rage Against the Machine and I had a ton of fun there haha...I couldn't believe that I was enjoying so many of these rap bands that I just don't like at all (Although I was always a Wu Tang fan). The highlights were definetly Wu Tang and Rage, I've never been a fan of Rage but they were incredible live and their songs, with their stuipdly simple lyrics, seem like they were made to be sung along to by the crowd. Their guitarist is pretty incredible, too. He plays completely unlike anybody else I've ever seen, I always took his shredding skills for granted because the riffs used in their songs are so simple but...yeah it was a good time, New York City was awesome...some parts anyways. It was a pretty unique experience for somebody like me who lives in a small town in Massachusetts.
I think I'm going to go back to New York in about 3 weeks for the "Live Consternation Tour" with Katatonia, Swallow the Sun, Insomnium and Scar Symmetry, who I hope will make a very brief appearance.