If someone gave you a compilation that was only 60 minutes, that meant they were a stingy git, right? Either that or didn't own enough music to make a varied 90 minute tape. Having said that, one of the best homemade tapes I have is a 90 minuter with 4 Tindersticks songs on it. In a row. But somehow, it works and the tape is better for it.
PS This thread has an age restriction.