Having played since BECMI, I never really got caught up in the lore much. I've honestly not paid that much attention to it. There may be a few monster changes that I preferred in older editions, but not enough to think too much of it. I've always just mostly played the game and didn't keep up with different stories and settings.
It's kind of odd, since the two main gaming interests I have are D&D and Warhammer 40k (mostly Space Hulk related stuff). With D?&D I love every aspect of the game, but almost never read the novels (I've only ever read Darkwalker on Moonshae and the graphic novel versions of Drizzt), but with 40k, I don't play the game much (other than Space Hulk), but I love reading 40k books.