Do you have a DVD in your collection that lacks features you'd expect, or too many, or crazy ones?
I'll start -- yesterday my fiance and I were watching Mulholland Drive when there was a brief power outage in our house. After restoring the power, we were horrified to discover that this DVD had no chapter divisions -- so we had to FAST FORWARD through the first two hours of the movie (it's 2-1/2 hours long, so we probably would have been better off just watching it again from the beginning!).