The great reverence most here show for Sabbath that prompted me to make this thread, also got me to dust off a couple of my Sabbath CDs, and buy two more used that I once had on tape (Sabotage and s/t). Some of the songs clearly show the makings of metal, whilst others are basically hard rock. I like some of the songs a lot, whilst I don't like some at all (the one that goes "I was born with out you baby..." comes to mind). I would say that they do have some hard rock songs mixed in with their metal songs, and it is the hard rock songs that I don't like that much. Still, songs such as Children of the Grave, Symptom of the Universe, Electric Funeral, etc. definitely laid the foundation for all metal to come, and Sabbath are definitely the most essential metal band.