I think something seriously missing from Peter Jackson’s portrayal of the elves, something that Tolkien stresses almost every time he introduces an elf, is how joyful they are.
The elves of Rivendell, Mirkwood, etc are all portrayed as extremely jolly people. In the Hobbit book, when we are first introduced to the elves, they’re singing in the trees and teasing Thorin and co. Even when we’re introduced to the Mirkwood elves, who live in a much more dangerous environment, they’re feasting and singing to the barrels as they float down the river. Even after fighting in a war, their spirits aren’t dampened.
Tolkien stresses the joy of elves so much that it is used as a fucking narrative device to show when a situation is really really bad if even an elf is upset about it.
Elves are also meant to be a comforting presence to the reader, they are a kind and friendly folk and we know that the characters aren’t in danger around them.
Peter Jackson just kinda….misses all of that??? The films portray the elves as stoic and mysterious. All of the elves that he portrays rarely speak, let alone smile and it takes away from such a vital cultural aspect to the elves that they are an extremely warm and happy folk and it is their happiness that lifts the spirits of others and inspires them to carry on despite all the hardships.