Mine was probably an issue of AMAZING SPIDER-MAN from the 80's that was drawn by Todd McFarlane, because my mom had a subscription to it. I don't recall which, as I was pretty young and mostly just looked at the pictures. I'd recognized Spider-Man from NBC's "SPIDER-MAN AND HIS AMAZING FRIENDS", which was airing in syndication at the time (by the time it ended it's original run, I was three). As I got older and learned how to read better, I usually re-read a lot of Mom's ASM books, although some of the words were big and I didn't understand a few until I was well into elementary school - so much for comics rotting your brain, eh?
When I was very young (in kindergarten or younger), Spider-Man was in his black costume in the comics, and the Hulk at the time was gray. Mom had subscriptions to ASM, WEB, INCREDIBLE HULK, FANTASTIC FOUR, and THOR, and I vividly remember asking Mom about why Spider-Man's costume was different on a subway or bus somewhere, and somehow that led into asking why the Hulk was gray and not green. I remember when the Hulk became green again in the comics, that was a stunning thing to me; it took years for me to be aware that green was his default color.