I played a lot of FR back in AD&D 2nd times. I played a bard, but every other player at the table I joined knew so much more about FR because they had read a bunch of novels and such. I really worked to up my FR knowledge.
Then I played it with other DMs in later editions, and found that knowing a lot of the lore was a trap. Because if the DM doesn't know a specific piece of lore it's not true, and you don't know what exactly the DM knows. You look at big plots with big NPCs, and find out later that because you had knowledge the DM didn't, you've been looking in the wrong direction. Combined with not having information the DM expected everyone to have so you also couldn't connect the real dots.
I played Fr in 3e, 3.5, 4e and 5e. I've grown to hate it. It has too much lore, a real barrier to entry. You can't effectively use "I'm running in the FR" as a shortcut to a shared understanding with people you haven't gamed with, it's actively misleading. And I've grown to actively despise the thrice damned kitchen sink nature of it. Take races like the Warforged which have a rich and connected history in Eberron where they come from, and just snip it off until you have just the mechanics of the race and dump it in with a minimal explanation and localization.
I hope never to have to play in the Forgotten Realms again. Ever. But I probably will, with a DM wanting to run a hardcover campaign set there.