AC/DC were the first 'heavy' band I heard and liked as a child, definitely the gateway band for me getting into metal. Iron Maiden were the next step and I'd started playing bass at this point, Steve Harris was a huge early influence on my playing. Metallica were the first thrash I heard, a friend gave me a TDK C90 with RtL on one side and MoP on the other, that was it, I was gone. Kreator were the first "extreme" metal with harsh vocals I got into. Death's Spiritual Healing was the first Death Metal I heard, I couldn't believe that music could be so heavy, I was utterly blown away. Alice in Chains were the band that got me back into melodic music again after listening to pretty much nothing but extreme metal through the early 90s. I must've listened to Dirt about 10000 times through 93-94. Jamiroquai's early funk stuff got me into heaps of funk and jazz fusion which was the biggest musical shift for me playing wise, I used to play along to Emergency On Planet Earth for hours. Regurgitator were hugely influential around the late nineties and fused heaps of styles together. The Prodigy were the first electronic/dance music I heard and liked, huge gateway band for me, after that I got into Acid Techno and Psytrance.