I’m quite flattered that you want my opinion, apparently I had alot of thoughts on this, you’re getting a Wall of Text™,
enjoy!
I haven’t read the book, and I probably should, but I saw both “Let the Right One In” and “Let Me In.” I preferred the original movie to the US remake but they were both very good! I am really picky about the vampire media I like, they have to be characters first and vampires second, and the vampiring has to be compelling in some way, introducing something new and believable to the lore.
I don’t remember it completely so I can’t get into a lot of detail, but browsing gifs reminds me what I loved about it: a dreamy and chilly atmosphere, lots of good vampire physiology woven in seamlessly, and the child actors were all amazingly talented, they all seemed very genuine, their emotions were real with subtle variations, and not mimicry, which can happen with child actors. The whole cast of both movies had great chemistry and I believed in all of them. The basic concept of Eli needing a mortal attendant, and this is the story of how she found a new one!! #MY HEART.
The original actors were better, in my opinion, bc they seemed more like the kind of kids who might live next door to you. As opposed to the trope of the “girl/boy next door” who is attractive and popular, you might not take special notice of these kids, they have their own kind of beauty but weren’t the conventionally attractive kind you see in ads.
Eli especially had the perfect blend of childlike curiosity and that old soul carried within, not a face you’d use to sell laundry soap, fortunately. Otherworldly w/o being too supernatural. EDIT: Eli’s gender is ambiguous, according to this Wiki post: “The original film ultimately leaves the character’s gender ambiguous, as the scene showing Eli’s scarred genitalia is not explained. In both films, the vampire tells the boy “I’m not a girl”. In the 2010 film it is quite clear that Abby was born female,…” I interpreted that line of dialogue as meaning that Eli is not a mortal girl, but not that it was a statement about her gender, also. As I said, I haven’t read the book, and maybe that will change my headcanon, but for now, I headcanon Eli as female and will use those pronouns.

This vampire story also brought back the idea of having to be invited in, and without that permission, the vampire in question would start having physical reactions! Like a severe allergic reaction! We got the blood tears that not many vampire movies want (or are able) to tackle.

Then there’s the whole sunlight makes them spontaneously combust, we all expected smtg to happen to this accidentally-turned victim and IT HAPPENED in a HOSPITAL idk that made it really funny to me! Dying dramatically in a place of healing, the orderly opening the blinds bc that’s usually a friendly thing to do BUT NOT TODAY.

Then we have Oskar, who was so sweet to Eli. Yes he’s platinum blond with skin as white as leprosy (did you see what I did there??) but this is a kid who gets bullied on a regular basis and hasn’t lost his kind heart.

You can tell that he’s intrigued by Eli and cares about her before they’ve even had that much time to get to know eachother, it’s that way for best friends. Sometimes you just know in the first 5 min of meeting someone that you want to be friends with them forever, if possible ^u^
I don’t remember when this hug occurs but just look at them, she is so scared of liking him, bc she might hurt him, she’s holding back so hard, just… it’s so good! Such chemistry between them. He wants to teach her about modern things, she wants to have a reason to live, it reminds me very much of Daniel/Armand.

Yah so overall, thanks for reminding me of these movies! I think a rewatch is needed…