I think what I miss the most about old school games is the mystery they had around them. With internet still on dialup and the lack of information on it to begin with you had to rely on rumors and sheer will. For example: How many have tried getting into that secret base on the dam in GoldanEye? How many of you had a friend who swore he had cousin who made it there? Or how many of you tried getting the Triforce in Ocarina of Time. I think that's what I miss the most about them.
What do you miss?