for me it's probably back in my early teens in the middle 80s. hopping on the train with my good pal Paul in Ossining, NY and riding down to Grand Central to go to one of the shows downtown. wandering around the whole afternoon, looking for deals on books we didn't have - Byrne X-Men, Perez Teen Titans, Miller DDs, etc - buying a nice stack, getting a sausage and peppers sub from this place in Grand Central and then riding the hour or so back, reading the stuff we bought and talking about comics the whole way. did this for two or three years in a row, just two kids spending a comic-centered day.
the only specific memory i have of those shows is waiting in line to have Simonson sign two copies of Thor 337 on the bottom margin of the front page. still have one of them i think