I believe that Fantastic Four #93 is the first comic I ever saw.
I remember vividly the circumstances of the occasion (I won't bore you with them), but the end result is a deep love of the entire storyline.
Considering that, if one is objective, that story isn't close to Kirby's best work, it's surprising to me how many collectors share my feelings for it. Maybe because it's the last "big" Lee/Kirby FF story.
It might not share the "greatness" of other arcs, but it’s remarkably original: Kirby managed to create a cohesive whole adding several things, including his passion for the "days of the mob". As it’s done, it’s truly original, because it involves the FF that – by back then – were already full developed characters with their precise identity and not a generic "science fiction plot" (I think there is an episode of Star Trek with a similar idea, but the FF story is a lot more original, for various reasons).
And no, you won’t definitely bore me with such things…