Concert? Getting a CD?
Mine is probably Homecoming dance this year. That was pretty intercourse ing awesome.
playing in Carnegie Hall with my high school band.
Freakin epic
Discovering DDR.
It was fundamental to the formation of my love of video games, especially of the rhythm genre.
mstrkrft last month was awesome and takes a second place.
all of our dances were ass (many, many people agree with me on this point (I can explain for reasons other than the music)), and the concerts I had been to prior to this were either jazz (snooze) or just weren't as fun (weird al and green day were awesome, but not nearly as awesome as mstrkrft).
then again, jazz band is a good memory too, but 5 years of music education isn't "a" memory.
probably last year when i finally beat my piano rival for the first time evar. :D
Playing my first full, real song on guitar, Blitzkrieg Bop by the Ramones.
Also seeing my favorite band Sum 41 live.