Best for me was hands-down Corrosion of Conformity at the Whisky.
They were playing a Black Sabbath cover & the crowd went nuts. The audience interaction was top-shelf.
It's actually almost a tie with a performance by L7 I saw around the same time at The Palace. The amount of bodies floating around on top of the crowd was insane & it felt like the entire room was moving. The band was on FIRE!
A close 3rd would be Exodus at the Vic Theatre in Chicago.
And finally Testament & Vio-Lence for my first live show ever, what a great day & night!