I also get goose bumps every time I hear the music during the scene where Luke's rage takes over and he wails on Vader in the passionate father-son dual. I was on the bus listening to it and I noticed the little hairs all over my legs and arms were standing straight up. It was 82 degrees in there.
I'm the same way. I picked up the ROTJ soundtrack just for that one bit. It's really emotional yet really eerie at the same time.