God, what do you people have against Harry Potter?! You never let it go!
I'd probably be obsessed with Harry Potter only. I never obsessed over any fantasy or books other than Lotr and HP. And my walls would lack posters. And I'd spend next to no time on the net.
And yes, the elves would still be the little creatures with spiky hair and not those tall, gangly things that walk like they're catwalk material. I happen to be pro-micro on the elves issue.
Gosh, the internet minus 6 million Lotr sites and actor appreciation sites... I wonder what would be there instead. We would all be discussing ShadowPlains, or The Light of the Dragon Crystal, or some other fantasy epic. I'd be Tyran Nosebleeder (?), the Dark Elf from the Obsidian Coast. I'll stop there, I'm really getting into this...