My favorite headcannon I have going for LOTR right now is that the elves that are still around by the time Frodo gets on the scene are the elvish equivalent of doomsday preppers.
I forget where I read it, but I'm pretty sure that at some point there were millions of elves on Middle-earth, and by the end of the third age, it's down to a few thousand, aka a very small portion. These are the elves that got told way back in the first age, "Hey, just so you guys know, you're totally welcome to come back and live in heaven now without any worries" and responded, "No thanks, we're good!" and then proceeded to not only hold to that but survived the next 7.000 years of bullshit including but not limited to:
Multiple continents sinking into the sea
multiple wars with Sauron, a literal divine being
The rise and fall of several human empires
a bunch of their territory being overtaken and burned to the ground
And all of their loved ones either dying or sailing, even though we know that grief can and will kill an elf
Like, you can't tell me that third age elves start showing up in the undying lands, where everyone has spent the last few thousand years basking in the magical equivilant of free therapy and probably have as many defence measures as a suburban coldesac, and aren't viewed as the most feral, twitchy, paranoid mother fuckers; held together by suspicion, stubornness, and at least 25 contingencies for every situation they've collectively encountered during their time in Middle-earth.
My favorite examples of feral, hyper-vigilant behavior include:
Elrond: Security clearance; sure, Turgon may have threatened to kill anyone who tried to leave his hidden city, but he also took an entire army out of and back to the city at once, and then also didn't realize that his own nephew snitched on where the city was. His security protocols sucked. Meanwhile, Elrond had hundreds of strangers coming in and out of Rivendell for over 3,000 years, at one point completely surrounded by enemies and full of nothing but a bunch of refugees, and Sauron still never found it. You can't tell me that he didn't have at least 25 security checkpoints on the way into his city(sorry, house-that means it's private property, right?), even if you didn't know they were there.
Galadriel: Paranoia; This woman was magically keeping track of everyone she knew and even did it often enought that she knew what to look for of those she couldn't directly track (gandalf) and looking into their minds and testing them. All while having Sauron constantly clawing at the walls of her mind, at least for a few years
Thranduil: Spite; it was basically only his sheer audacity holding his nuclear bunker- cough cough- sorry, I meant vast underground halls together, while his next-door neighbor was some cursed ruins, a dragon-infested dwarf kingdom, and evil, man-eating, car-sized spiders on his front lawn.
Haldir: he blindfolded the fellowship when they tried to enter his city (super secret hideout), need I say more?
Multiple examples of groups of elves jumping out of trees fully armed and ambushing anyone who wanders into their territory. And while the characters seem surprised to be ambushed, they don't seem surprised that elves ambush people in general, leading me to believe this is normal behavior.
In summary, while the elves in the LOTR and the Hobbit seem all chill and fun, I like to imagine them as the crazy raccoons of the elvish family trees that wandered in 5 hours late.
