Well, I now have no irl friends, I always spend all my time reading Tolkien, on the internet (PT of course) or studying quenya. I have stopped speaking my mother tongue and I am going to have surgery on my ears to make them more pointy. I threw away all my clothes and am now mostly wearing clothes from the movies and a grey elven cloke, with a brooch that looks like a leaf from Lothlorien. I've started using bow and am learning the techniques used for a sword, so I can fight back if I'm being attacked by orcs or such.
So I guess you could say it changed me a bit, but nothing drastic.
"Always forgive your enemies; nothing annoys them so much."