I think they're one of the only metal bands that write songs that aren't really 9-minute Guitar Clinics in disguise.
Whilst I'm a fan of a lot of that kind of music (Opeth!!!!), I know just what you mean. MDB perfected the art of slow, relatively simple songs that just sound awesome.
I'm yet to get a proper listen of 34.540505% complete, but agree on there being some damn decent stuff on 'Songs of Darkness, Words of Light'. Catherine Blake!!
Turn Loose the Swans is still their best though, imo, just for the quantity of awesome tracks. Sear Me MCMXC III, The Crown of Sympathy, The Snow in my Hand, etc.