The course around and through Hollywood Studios was interesting conceptually. Realistically, it was a little boring. I knew what was coming up again (The Osbourne Lights) and that's what kept me going. You actually ran around the outside of the park on the main road leading to Magic Kingdom with cars speeding by. I saw a few runners get close to the car lane and got a bit nervouse, but luckily nothing happened (at least when I was there). You ran a lot backstage, but they did have Wreck-It-Ralph there to get pictures with! It's nice they brought out a new character!
The Osbourne Spectacle of Dancing Lights is always on of my favorite holiday traditions. I actually went on Thursday with my roommate to see them get turned on on the first night. My suggestion, if you can get there at dusk and see them get turned on... that's where the magic is. The lights and the magic and memories connected with them helped push me through the rest of the studios.