30 Days of Marvel, Day 1: The first comic that got you hooked on Marvel

“The Return of the Super-Skrull” by Stan Lee and Jack Kirby in Fantastic Four #18: the comic that sparked a lifelong passion.
I found it by chance at Leo's Confectionary at the corner of Clare and Kirkwood, browsing for something to read. I already read DC comics on an occasional basis. This didn't have characters I recognized, but it looked interesting.
It was.
If I hadn't been already hooked by that story (and I was), I was hooked when, shortly later, I read The Amazing Spider-Man #4, "Nothing Can Stop the Sandman". And then Fantastic Four #19 was a story set in Ancient Egypt - I was doomed by then.
Yup, addicted from a young age.