Why is that weird?You like Slipknot, korn and others and have never listened to a full Sabbath album? Weird.
I like a few of Sabbath and Ozzy's songs, but not enough to want to listen to other than their best/most popular ones.
I respect what they have done for rock and metal, but no interest in listening to a full album.
You think that all metalheads like the same music, and have to love Ozzy, Van Halen and Iron Maiden ?