The only downside to Black Sabbath songs is most folks have heard those a million times.
Unless you are talking about "Paranoid", "War Pigs", and "Ironman" that is totally untrue. Some of their best stuff came out after Ozzy left the band and you NEVER hear any of that. In fact, you never hear anything after Master of Reality (and then only "Sweet leaf"). There's gold on those other albums.