Yeh, I always liked Kill 'em All even better than (please don't hate me!) Master of Puppets and Ride the Lightning. But it's all quality stuff for sure.
My all-time Faves:
Led Zeppelin I-IV (Led Zeppelin
Machine Head, In Rock (Deep Purple)
Hypnotize, Mezmerize (System of a Down)
But my very favourite would have to be Scenes From a Memory (Dream Theater) - I've listened to it so many times, but I still get something different from it each time... if you know what I mean. It's the kind of album where it's really good on the first listen, but it still gets even better every time you hear it.
Incredible stuff.