Is it normal that i dress up as the joker and mimmick what he does in the movie

i love the joker always have, always will. heath ledger is my favorite joker. i love him so much that i paid 200 dollars for a dark knight joker costume and put fake grenades on the inside of the purple coat and glued a fake blade to the bottom of a shoe. i even have a purple and green tattoo that says, AGENT OF CHAOS. here's the weird part. whenever i get a makeup kit i either use it to cosplay OR...or i go in my room at night only and dress up as the joker and pop in batman dark knight and watch ONLY the joker scenes and mimic everything joker says and does in the movie. i don't even watch the full movie anymore, ONLY the joker parts. I've memorized everything the joker says and does in the movie and as soon as i get a camcorder I'm acting out all the joker scenes in the movie myself and putting them on youtube. am i the only one in the world who does this? or is this just me? thanks guys.