YOB is fantastic. I have
Catharsis, The Illusion of Motion, and
The Unreal Never Lived. All of 'em rule; they're among my favorite doom acts, for sure. They're really unique, particularly in Mike Scheidt's vocal style. It's very HEAVY, trippy, psychedelic doom metal. Imagine Sleep meets Neurosis, with a bit of Cathedral and Sabbath thrown in for good measure... sort of.
Lyrically, they delve into a lot of Eastern religion and philosophy. I wouldn't be surprised if Scheidt is Buddhist. As a Christian, I don't find it offensive, but of course the belief system they promote differs quite a bit from my own.
Hope this is helpful... check 'em out, I don't think you'll be disappointed! Now I've gotta go check out Midian!