I had a similar experience when I popped in an old DVD of Star Wars (i.e. A New Hope) recently. If I recall correctly, there are some short clips and audio that play as part of the intro before you even get to the main menu, and it includes the famous John Williams theme. I hadn't seen the movie in ages, so I wanted to go in fresh, and this totally ruined the experience.

I had the opposite experience when I popped in another old DVD, this time Amadeus. I hadn't seen the movie before, but I was shocked and pleasantly surprised when it literally started playing from the very beginning of the movie. No DVD menu or previews at all. It just felt so good to go straight to the story.