This one is tough for me, but Fabulous Disaster is my favorite with Bonded by Blood closely behind. Fabulous Disaster is just simply flawless, it's heavy, it has nice riffs and solos, and most of the songs are pretty catchy.
I only own three of their albums (Bonded by Blood, Tempo of the Damned, and Shovel Headed Killing Machine). The only one I thought was awesome was Shovel.