It's difficult because I enjoy all their releases...
Breeding Death IS awesome, but if I had to pick my favourite it'd have to be a full-length. Which rules out
Unblessing the Purity... You know what? I'm going to go for
The Wacken Carnage. It's the best live album I have ever heard, the song selection is almost as perfect as the performances and I always preferred Akerfeldt's vocals to Tägtgren's. Though I have to say
Nightmares Made Flesh is a great album.
Man, I think it's quite clear we could fill a whole thread on Bloodbath