It occurred to me that I never shared my stories...
The best I ever saw was Chick Corea on November 29th 2000 at the Blue Note in NYC (my 18th birthday)
The whole evening was surreal. At the time, and even today, Chick was one of my absolute idols. The evening started out with me and my girlfriend at the time just sitting there and my girlfriend mentioned to the guy next to me that it was my birthday whereupon he slipped me a 100 dollar bill!! This random stranger just handed me a hundred bucks! And while I tried not accept, he insisted! Then my mother arrived (which I had not been expecting) and told Chick backstage it was her son's birthday. He sang happy birthday to me from the stage in between one of the songs, but the real highlight was when he asked me to come back stage and have a one on one chat in between sets. I ended up just sitting there with world renowned genius, Chick Corea, and just talking to him about music and other stuff for like 70 minutes. It is one of the fondest memories of my life. To this day, when I see Chick play live, he knows me by name and we still chat.
The worst concert I ever saw was...
Daniel Barenboim conducting Berlin Staatskapelle in Mahler's Das Lied von der Erde (May of 2009 at Carnegie Hall)
I haven't seen too many bad concerts, this was the worst. It's one of my favorite pieces of music and the performance did not move me at all. I didn't like Michelle DeYoung's shaky vibrato throughout and I felt the orchestra somehow got lost in the final movement. I saw the entire 10 concert series of Mahler's entire output and this was in my opinion the only real dud.