Hello,
I'm new to the CGC forums and thought this would be as good a thread to post my first comment as any.
48, 49 and 50 were the first comics I collected. Don't get me wrong, as a kid I bought, read and abused hundreds of comics, but these were my first as a collector.
The Galactus / SS story was the most impactful to my father as a child and he would tell the story to my brother and I. As a high school student in the late 90s I bought FF 48 at a convention for $55. I had it graded a few years ago and it came back at 5.5. Conventions in the early internet days were a much different scene.
I bought 49 and 50 a few years later and when we bought our first house, 49 proudly displayed in our living room along with as handful of other keys.
As for Kirby covers I've always thought 72 was the best, but 49 will always be my favorite.