I think I was most fond of Paranoid, and after than not much else except Crazy Train from Blizzard of Ozz.

I get kind of selective with most artists especially if their early works were really the gem of their career and everything else deteriorated into just lack-luster attempts to reach that passing peak.

I do like heavy metal, so lots of great bands like AC/DC, Metallica, Slayer, Iron Maiden... all the classics.