There were lots of variables to ensure a good cd was burned correctly. Quality of the burner, the quality of cds (from having used hundreds of them, they really had varying qualities) and a big one was the speed of the burn. Lot's of cds did not work for me when the burning speed was too high, for a good one to happen it had to be done in low speed. Also software to burn them sometimes fucked things up, I remember a time when Nero was destroying a bunch of my cds.

And then the copy protections of some influenced many copies, some made it very difficult. But at least we had cracks and all the warez around. Good times.