Comic book letter pages of any era are fun to read, but I find the letters printed from the late 1950's through the 60's especially entertaining. When compared to today's more cynical "been there, done that" seen-it-all internet fan community, the letter-writing fans of that era had an endearing (and refreshingly non-jaded) brand of enthusiasm. Sure, they had their share of cranks, too...but for the most part, they were a bright-eyed, bushy-tailed bunch that obviously loved reading comics.
For example, take this gem from The Hammer Strikes, the letters page from Journey Into Mystery #121 (1965). A lad named George Tsakiris from New York loves reading the adventures of Thor...but doesn't quite get the "Neverending Battle" aspect of the superhero's life. Let's check out George making the case for Thor to get a day off once in awhile, followed by Smilin' Stan's playful reply of mock exasperation:
Cheee! Yeah, Stan had a good point there. Though George's heart
was undoubtedly in the right place, I don't think the world was
quite ready for a special All-Napping issue of Thor.
Of course, with the slow-moving, "decompressed" storytelling that defines today's comics, maybe George (if he's still reading comics) finally got his wish for relaxed, action-free superhero stories.