I don't like the idea of a 'Perfect' album. In our I Pod age we have lowered our tolerance, Albums used to be listened to 'warts and all', even 'Plaistow Patricia' on 'New Boots and Panties'. now we just extract the 'good' tracks. So I'd argue that a 'Perfect' album should have at least two dud tracks. That's what distinguishes a fan, sticking with an artist through the dross.
Damon.