I've only been to 2 concerts that I consider "real" concerts. I saw Guns N' Roses in 2006 which was awesome if only because I got to see my favorite band live.
Then last summer I saw Alice In Chains/Velvet Revolver. That was an awesome show. I wish I had been more into AIC at the time because now they're probably my second favorite band but at the time I didn't know many of the songs they played. And of course just seeing Slash live was the big highlight for me.
This summer I was supposed to see Nine Inch Nails live but they postponed the show the morning of the concert and I'm going to be down at school for the make-up date.
I might come back up to see it anyways but I'm not sure yet.