Technically, I got dragged to a NKOTB concert when I was like 7 or 8. It was my sister's deal, but that was technically my first concert.
First concert that I actually paid to go to myself, was either Beck or RATM. They were same year, but I can't quite remember what was first, and I'm too lazy to go look at my stubs.
Although, I do believe my very first might've been an Edgefest(those years are a bit of a blur), where I saw a local Canadian band on the second stage. You might've heard of them. They were called "Nickleback". Heard they've done some things since then. Oh' and the headliner on the main stage was "Creed". Yes, I saw Nickleback and Creed on the same day, and didn't go blind and deaf. Doctors say I'm a miracle.