If Rock/Metal related then probably Songs for the Deaf (Queens of the Stone Age), and something by Opeth at the minute, most likely Blackwater Park. I agree the definition above, that you have to love every song on an album and not want to skip through. Other favourite albums of mine would be Bleach (Nirvana), Black Album (Metallica), Divine Intervention (Slayer). I enjoy reading these threads, always a good indicator on what is worth listening to that I had maybe skipped before.